253664537 has 32 divisors (see below), whose sum is σ = 312698880. Its totient is φ = 201116160.

The previous prime is 253664501. The next prime is 253664549. The reversal of 253664537 is 735466352.

It is not a de Polignac number, because 253664537 - 2¹⁰ = 253663513 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 253664494 and 253664503.

It is not an unprimeable number, because it can be changed into a prime (253664137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1088573 + ... + 1088805.

It is an arithmetic number, because the mean of its divisors is an integer number (9771840).

Almost surely, 2^253664537 is an apocalyptic number.

It is an amenable number.

253664537 is a deficient number, since it is larger than the sum of its proper divisors (59034343).

253664537 is a wasteful number, since it uses less digits than its factorization.

253664537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its digits is 453600, while the sum is 41.

The square root of 253664537 is about 15926.8495629236. The cubic root of 253664537 is about 633.0236250892.

The spelling of 253664537 in words is "two hundred fifty-three million, six hundred sixty-four thousand, five hundred thirty-seven".