253774656 has 42 divisors (see below), whose sum is σ = 727400882. Its totient is φ = 84591360.

The previous prime is 253774639. The next prime is 253774673. The reversal of 253774656 is 656477352.

It is an interprime number because it is at equal distance from previous prime (253774639) and next prime (253774673).

It can be written as a sum of positive squares in only one way, i.e., 228614400 + 25160256 = 15120^2 + 5016^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219715 + ... + 220866.

Almost surely, 2^253774656 is an apocalyptic number.

It is an amenable number.

253774656 is an abundant number, since it is smaller than the sum of its proper divisors (473626226).

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

253774656 is a wasteful number, since it uses less digits than its factorization.

253774656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440599 (or 440586 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 45.

The square root of 253774656 is about 15930.3062117462. The cubic root of 253774656 is about 633.1152130381.

The spelling of 253774656 in words is "two hundred fifty-three million, seven hundred seventy-four thousand, six hundred fifty-six".