51154550500 has 48 divisors (see below), whose sum is σ = 112873413744. Its totient is φ = 20250854400.

The previous prime is 51154550471. The next prime is 51154550549. The reversal of 51154550500 is 505545115.

It can be written as a sum of positive squares in 8 ways, for example, as 2897884224 + 48256666276 = 53832^2 + 219674^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478867 + ... + 575866.

It is an arithmetic number, because the mean of its divisors is an integer number (2351529453).

Almost surely, 2^51154550500 is an apocalyptic number.

51154550500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51154550500 is an abundant number, since it is smaller than the sum of its proper divisors (61718863244).

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

51154550500 is a wasteful number, since it uses less digits than its factorization.

51154550500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054849 (or 1054837 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 31.

The spelling of 51154550500 in words is "fifty-one billion, one hundred fifty-four million, five hundred fifty thousand, five hundred".