15782969081 has 12 divisors (see below), whose sum is σ = 18102495936. Its totient is φ = 13724318520.

The previous prime is 15782969071. The next prime is 15782969093. The reversal of 15782969081 is 18096928751.

It is not a de Polignac number, because 15782969081 - 2²² = 15778774777 is a prime.

It is a super-2 number, since 2×15782969081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15782969071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2832821 + ... + 2838386.

It is an arithmetic number, because the mean of its divisors is an integer number (1508541328).

Almost surely, 2^15782969081 is an apocalyptic number.

15782969081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15782969081 is a deficient number, since it is larger than the sum of its proper divisors (2319526855).

15782969081 is a wasteful number, since it uses less digits than its factorization.

15782969081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671252 (or 5671241 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 15782969081 in words is "fifteen billion, seven hundred eighty-two million, nine hundred sixty-nine thousand, eighty-one".