253950685817 has 48 divisors (see below), whose sum is σ = 272147331456. Its totient is φ = 236861625600.

The previous prime is 253950685801. The next prime is 253950685853. The reversal of 253950685817 is 718586059352.

It is a happy number.

It is not a de Polignac number, because 253950685817 - 2⁴ = 253950685801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253950687817) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 827200778 + ... + 827201084.

It is an arithmetic number, because the mean of its divisors is an integer number (5669736072).

Almost surely, 2^253950685817 is an apocalyptic number.

It is an amenable number.

253950685817 is a deficient number, since it is larger than the sum of its proper divisors (18196645639).

253950685817 is a wasteful number, since it uses less digits than its factorization.

253950685817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 59.

The spelling of 253950685817 in words is "two hundred fifty-three billion, nine hundred fifty million, six hundred eighty-five thousand, eight hundred seventeen".