15754990771 has 24 divisors (see below), whose sum is σ = 18089938160. Its totient is φ = 13637279232.

The previous prime is 15754990763. The next prime is 15754990813. The reversal of 15754990771 is 17709945751.

It is not a de Polignac number, because 15754990771 - 2³ = 15754990763 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15754990751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1033120 + ... + 1048258.

Almost surely, 2^15754990771 is an apocalyptic number.

15754990771 is a deficient number, since it is larger than the sum of its proper divisors (2334947389).

15754990771 is a wasteful number, since it uses less digits than its factorization.

15754990771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15463 (or 15446 counting only the distinct ones).

The product of its (nonzero) digits is 2778300, while the sum is 55.

The spelling of 15754990771 in words is "fifteen billion, seven hundred fifty-four million, nine hundred ninety thousand, seven hundred seventy-one".