1969041645 has 12 divisors (see below), whose sum is σ = 3413005596. Its totient is φ = 1050155520.

The previous prime is 1969041593. The next prime is 1969041653. The reversal of 1969041645 is 5461409691.

It is a happy number.

1969041645 is a `hidden beast` number, since 196 + 9 + 0 + 416 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 355171716 + 1613869929 = 18846^2 + 40173^2 .

It is not a de Polignac number, because 1969041645 - 2²¹ = 1966944493 is a prime.

It is a super-3 number, since 3×1969041645³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 43756481 = 1969041645 / (1 + 9 + 6 + 9 + 0 + 4 + 1 + 6 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1969041645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21878196 + ... + 21878285.

It is an arithmetic number, because the mean of its divisors is an integer number (284417133).

Almost surely, 2^1969041645 is an apocalyptic number.

1969041645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1969041645 is a deficient number, since it is larger than the sum of its proper divisors (1443963951).

1969041645 is a wasteful number, since it uses less digits than its factorization.

1969041645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43756492 (or 43756489 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1969041645 is about 44373.8847183791. The cubic root of 1969041645 is about 1253.3863686548.

The spelling of 1969041645 in words is "one billion, nine hundred sixty-nine million, forty-one thousand, six hundred forty-five".