253555864 has 64 divisors (see below), whose sum is σ = 515750400. Its totient is φ = 116557056.

The previous prime is 253555853. The next prime is 253555879. The reversal of 253555864 is 468555352.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 253555864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577357 + ... + 577795.

It is an arithmetic number, because the mean of its divisors is an integer number (8058600).

Almost surely, 2^253555864 is an apocalyptic number.

It is an amenable number.

253555864 is an abundant number, since it is smaller than the sum of its proper divisors (262194536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253555864 is a wasteful number, since it uses less digits than its factorization.

253555864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 580 counting only the distinct ones).

The product of its digits is 720000, while the sum is 43.

The square root of 253555864 is about 15923.4375685654. The cubic root of 253555864 is about 632.9332138142.

The spelling of 253555864 in words is "two hundred fifty-three million, five hundred fifty-five thousand, eight hundred sixty-four".