253777891380 has 96 divisors (see below), whose sum is σ = 765324806400. Its totient is φ = 62461314048.

The previous prime is 253777891343. The next prime is 253777891399. The reversal of 253777891380 is 83198777352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11313616 + ... + 11336024.

It is an arithmetic number, because the mean of its divisors is an integer number (7972133400).

Almost surely, 2^253777891380 is an apocalyptic number.

253777891380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253777891380 is an abundant number, since it is smaller than the sum of its proper divisors (511546915020).

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

253777891380 is a wasteful number, since it uses less digits than its factorization.

253777891380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36953 (or 36951 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 60.

The spelling of 253777891380 in words is "two hundred fifty-three billion, seven hundred seventy-seven million, eight hundred ninety-one thousand, three hundred eighty".