15749394081 has 16 divisors (see below), whose sum is σ = 21083455488. Its totient is φ = 10457528400.

The previous prime is 15749394071. The next prime is 15749394109. The reversal of 15749394081 is 18049394751.

It is not a de Polignac number, because 15749394081 - 2⁷ = 15749393953 is a prime.

It is a super-2 number, since 2×15749394081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15749394041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1072096 + ... + 1086686.

It is an arithmetic number, because the mean of its divisors is an integer number (1317715968).

Almost surely, 2^15749394081 is an apocalyptic number.

It is an amenable number.

15749394081 is a deficient number, since it is larger than the sum of its proper divisors (5334061407).

15749394081 is a wasteful number, since it uses less digits than its factorization.

15749394081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16012.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 15749394081 in words is "fifteen billion, seven hundred forty-nine million, three hundred ninety-four thousand, eighty-one".