19157772464 has 40 divisors (see below), whose sum is σ = 39312617760. Its totient is φ = 9012896768.

The previous prime is 19157772449. The next prime is 19157772503. The reversal of 19157772464 is 46427775191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265162 + ... + 1280214.

It is an arithmetic number, because the mean of its divisors is an integer number (982815444).

Almost surely, 2^19157772464 is an apocalyptic number.

It is an amenable number.

19157772464 is an abundant number, since it is smaller than the sum of its proper divisors (20154845296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19157772464 is a wasteful number, since it uses less digits than its factorization.

19157772464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19757 (or 19751 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 53.

The spelling of 19157772464 in words is "nineteen billion, one hundred fifty-seven million, seven hundred seventy-two thousand, four hundred sixty-four".