253365530665 has 128 divisors (see below), whose sum is σ = 363131112960. Its totient is φ = 167967571968.

The previous prime is 253365530659. The next prime is 253365530669. The reversal of 253365530665 is 566035563352.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 253365530665 - 2³ = 253365530657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253365530669) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 668510446 + ... + 668510824.

It is an arithmetic number, because the mean of its divisors is an integer number (2836961820).

Almost surely, 2^253365530665 is an apocalyptic number.

It is an amenable number.

253365530665 is a deficient number, since it is larger than the sum of its proper divisors (109765582295).

253365530665 is a wasteful number, since it uses less digits than its factorization.

253365530665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 7290000, while the sum is 49.

The spelling of 253365530665 in words is "two hundred fifty-three billion, three hundred sixty-five million, five hundred thirty thousand, six hundred sixty-five".