51457550540 has 48 divisors (see below), whose sum is σ = 120108834720. Its totient is φ = 18358778880.

The previous prime is 51457550519. The next prime is 51457550549. The reversal of 51457550540 is 4505575415.

It is not an unprimeable number, because it can be changed into a prime (51457550549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2194925 + ... + 2218244.

It is an arithmetic number, because the mean of its divisors is an integer number (2502267390).

Almost surely, 2^51457550540 is an apocalyptic number.

It is an amenable number.

51457550540 is an abundant number, since it is smaller than the sum of its proper divisors (68651284180).

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

51457550540 is a wasteful number, since it uses less digits than its factorization.

51457550540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413242 (or 4413240 counting only the distinct ones).

The product of its (nonzero) digits is 350000, while the sum is 41.

The spelling of 51457550540 in words is "fifty-one billion, four hundred fifty-seven million, five hundred fifty thousand, five hundred forty".