253649681280 has 128 divisors (see below), whose sum is σ = 898342682400. Its totient is φ = 67639910400.

The previous prime is 253649681251. The next prime is 253649681297. The reversal of 253649681280 is 82186946352.

253649681280 is a `hidden beast` number, since 2 + 53 + 6 + 496 + 81 + 28 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 7322121 + ... + 7356680.

Almost surely, 2^253649681280 is an apocalyptic number.

253649681280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253649681280 is an abundant number, since it is smaller than the sum of its proper divisors (644693001120).

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

253649681280 is a wasteful number, since it uses less digits than its factorization.

253649681280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14678829 (or 14678811 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 253649681280 in words is "two hundred fifty-three billion, six hundred forty-nine million, six hundred eighty-one thousand, two hundred eighty".