253664536 has 8 divisors (see below), whose sum is σ = 475621020. Its totient is φ = 126832264.

The previous prime is 253664501. The next prime is 253664549. The reversal of 253664536 is 635466352.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15854026 + ... + 15854041.

Almost surely, 2^253664536 is an apocalyptic number.

It is an amenable number.

253664536 is a deficient number, since it is larger than the sum of its proper divisors (221956484).

253664536 is a wasteful number, since it uses less digits than its factorization.

253664536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31708073 (or 31708069 counting only the distinct ones).

The product of its digits is 388800, while the sum is 40.

The square root of 253664536 is about 15926.8495315301. The cubic root of 253664536 is about 633.0236242573.

The spelling of 253664536 in words is "two hundred fifty-three million, six hundred sixty-four thousand, five hundred thirty-six".