1649869463 has 8 divisors (see below), whose sum is σ = 1801388160. Its totient is φ = 1498605880.

The previous prime is 1649869457. The next prime is 1649869469. The reversal of 1649869463 is 3649689461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1649869457) and next prime (1649869469).

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 1649869463 - 2²⁴ = 1633092247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1649869399 and 1649869408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649869469) 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, 50123 + ... + 76236.

It is an arithmetic number, because the mean of its divisors is an integer number (225173520).

Almost surely, 2^1649869463 is an apocalyptic number.

1649869463 is a deficient number, since it is larger than the sum of its proper divisors (151518697).

1649869463 is a wasteful number, since it uses less digits than its factorization.

1649869463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127557.

The product of its digits is 6718464, while the sum is 56.

The square root of 1649869463 is about 40618.5851920029. The cubic root of 1649869463 is about 1181.6345878069.

The spelling of 1649869463 in words is "one billion, six hundred forty-nine million, eight hundred sixty-nine thousand, four hundred sixty-three".