11720857564 has 12 divisors (see below), whose sum is σ = 22089308584. Its totient is φ = 5409626544.

The previous prime is 11720857537. The next prime is 11720857567. The reversal of 11720857564 is 46575802711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720857567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112700502 + ... + 112700605.

Almost surely, 2^11720857564 is an apocalyptic number.

It is an amenable number.

11720857564 is a deficient number, since it is larger than the sum of its proper divisors (10368451020).

11720857564 is a wasteful number, since it uses less digits than its factorization.

11720857564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225401124 (or 225401122 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 11720857564 in words is "eleven billion, seven hundred twenty million, eight hundred fifty-seven thousand, five hundred sixty-four".