551957693450 has 48 divisors (see below), whose sum is σ = 1043014995000. Its totient is φ = 217289053440.

The previous prime is 551957693393. The next prime is 551957693467. The reversal of 551957693450 is 54396759155.

It can be written as a sum of positive squares in 12 ways, for example, as 51077356009 + 500880337441 = 226003^2 + 707729^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 551957693450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 472196 + ... + 1151904.

Almost surely, 2^551957693450 is an apocalyptic number.

551957693450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

551957693450 is a deficient number, since it is larger than the sum of its proper divisors (491057301550).

551957693450 is a wasteful number, since it uses less digits than its factorization.

551957693450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679979 (or 679974 counting only the distinct ones).

The product of its (nonzero) digits is 25515000, while the sum is 59.

The spelling of 551957693450 in words is "five hundred fifty-one billion, nine hundred fifty-seven million, six hundred ninety-three thousand, four hundred fifty".