15764740991 has 16 divisors (see below), whose sum is σ = 16074250080. Its totient is φ = 15458826240.

The previous prime is 15764740967. The next prime is 15764740993. The reversal of 15764740991 is 19904746751.

It is a cyclic number.

It is not a de Polignac number, because 15764740991 - 2²² = 15760546687 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15764740993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6227396 + ... + 6229926.

It is an arithmetic number, because the mean of its divisors is an integer number (1004640630).

Almost surely, 2^15764740991 is an apocalyptic number.

15764740991 is a deficient number, since it is larger than the sum of its proper divisors (309509089).

15764740991 is a wasteful number, since it uses less digits than its factorization.

15764740991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 15764740991 in words is "fifteen billion, seven hundred sixty-four million, seven hundred forty thousand, nine hundred ninety-one".