51554120000 has 70 divisors (see below), whose sum is σ = 127837561698. Its totient is φ = 20621632000.

The previous prime is 51554119961. The next prime is 51554120053. The reversal of 51554120000 is 2145515.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 38506997824 + 13047122176 = 196232^2 + 114224^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 604427 + ... + 684426.

Almost surely, 2^51554120000 is an apocalyptic number.

51554120000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51554120000 is an abundant number, since it is smaller than the sum of its proper divisors (76283441698).

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

51554120000 is an equidigital number, since it uses as much as digits as its factorization.

51554120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288885 (or 1288860 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 51554120000 its reverse (2145515), we get a palindrome (51556265515).

The spelling of 51554120000 in words is "fifty-one billion, five hundred fifty-four million, one hundred twenty thousand".