252640126400 has 42 divisors (see below), whose sum is σ = 621652614960. Its totient is φ = 101056049920.

The previous prime is 252640126399. The next prime is 252640126463. The reversal of 252640126400 is 4621046252.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78948440 + ... + 78951639.

Almost surely, 2^252640126400 is an apocalyptic number.

252640126400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252640126400 is an abundant number, since it is smaller than the sum of its proper divisors (369012488560).

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

252640126400 is a wasteful number, since it uses less digits than its factorization.

252640126400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157900101 (or 157900086 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 252640126400 in words is "two hundred fifty-two billion, six hundred forty million, one hundred twenty-six thousand, four hundred".