1645069933 has 8 divisors (see below), whose sum is σ = 1787293368. Its totient is φ = 1505086464.

The previous prime is 1645069931. The next prime is 1645069939. The reversal of 1645069933 is 3399605461.

It can be written as a sum of positive squares in 4 ways, for example, as 28869129 + 1616200804 = 5373^2 + 40202^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1645069933 - 2¹ = 1645069931 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645069931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558460 + ... + 561397.

It is an arithmetic number, because the mean of its divisors is an integer number (223411671).

Almost surely, 2^1645069933 is an apocalyptic number.

1645069933 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1645069933 is a deficient number, since it is larger than the sum of its proper divisors (142223435).

1645069933 is a wasteful number, since it uses less digits than its factorization.

1645069933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119983.

The product of its (nonzero) digits is 524880, while the sum is 46.

The square root of 1645069933 is about 40559.4616951458. The cubic root of 1645069933 is about 1180.4876690121.

The spelling of 1645069933 in words is "one billion, six hundred forty-five million, sixty-nine thousand, nine hundred thirty-three".