511156452664 has 32 divisors (see below), whose sum is σ = 1125974006640. Its totient is φ = 214471238400.

The previous prime is 511156452661. The next prime is 511156452679. The reversal of 511156452664 is 466254651115.

It is a super-2 number, since 2×511156452664² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511156452661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223406397 + ... + 223408684.

Almost surely, 2^511156452664 is an apocalyptic number.

It is an amenable number.

511156452664 is an abundant number, since it is smaller than the sum of its proper divisors (614817553976).

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

511156452664 is a wasteful number, since it uses less digits than its factorization.

511156452664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446815111 (or 446815107 counting only the distinct ones).

The product of its digits is 864000, while the sum is 46.

The spelling of 511156452664 in words is "five hundred eleven billion, one hundred fifty-six million, four hundred fifty-two thousand, six hundred sixty-four".