551385942400 has 96 divisors (see below), whose sum is σ = 1442218997880. Its totient is φ = 207580569600.

The previous prime is 551385942397. The next prime is 551385942433. The reversal of 551385942400 is 4249583155.

It is a super-2 number, since 2×551385942400² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5013486 + ... + 5122285.

Almost surely, 2^551385942400 is an apocalyptic number.

551385942400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551385942400 is an abundant number, since it is smaller than the sum of its proper divisors (890833055480).

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

551385942400 is a wasteful number, since it uses less digits than its factorization.

551385942400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10135812 (or 10135795 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 551385942400 in words is "five hundred fifty-one billion, three hundred eighty-five million, nine hundred forty-two thousand, four hundred".