253216534664 has 16 divisors (see below), whose sum is σ = 474813431820. Its totient is φ = 126599619520.

The previous prime is 253216534663. The next prime is 253216534687. The reversal of 253216534664 is 466435612352.

It can be written as a sum of positive squares in 2 ways, for example, as 227092277764 + 26124256900 = 476542^2 + 161630^2 .

It is a super-2 number, since 2×253216534664² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253216534661) 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, 955679 + ... + 1191534.

Almost surely, 2^253216534664 is an apocalyptic number.

It is an amenable number.

253216534664 is a deficient number, since it is larger than the sum of its proper divisors (221596897156).

253216534664 is a wasteful number, since it uses less digits than its factorization.

253216534664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161960 (or 2161956 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 47.

The spelling of 253216534664 in words is "two hundred fifty-three billion, two hundred sixteen million, five hundred thirty-four thousand, six hundred sixty-four".