15642692991 has 6 divisors (see below), whose sum is σ = 22595001000. Its totient is φ = 10428461988.

The previous prime is 15642692963. The next prime is 15642692993. The reversal of 15642692991 is 19929624651.

It is not a de Polignac number, because 15642692991 - 2¹⁷ = 15642561919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15642692993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 869038491 + ... + 869038508.

It is an arithmetic number, because the mean of its divisors is an integer number (3765833500).

Almost surely, 2^15642692991 is an apocalyptic number.

15642692991 is a deficient number, since it is larger than the sum of its proper divisors (6952308009).

15642692991 is a wasteful number, since it uses less digits than its factorization.

15642692991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738077005 (or 1738077002 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The spelling of 15642692991 in words is "fifteen billion, six hundred forty-two million, six hundred ninety-two thousand, nine hundred ninety-one".