51137077540 has 24 divisors (see below), whose sum is σ = 107787085560. Its totient is φ = 20378788608.

The previous prime is 51137077499. The next prime is 51137077547. The reversal of 51137077540 is 4577073115.

It can be written as a sum of positive squares in 4 ways, for example, as 9577362496 + 41559715044 = 97864^2 + 203862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51137077493 and 51137077502.

It is not an unprimeable number, because it can be changed into a prime (51137077547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4747137 + ... + 4757896.

It is an arithmetic number, because the mean of its divisors is an integer number (4491128565).

Almost surely, 2^51137077540 is an apocalyptic number.

It is an amenable number.

51137077540 is an abundant number, since it is smaller than the sum of its proper divisors (56650008020).

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

51137077540 is a wasteful number, since it uses less digits than its factorization.

51137077540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9505311 (or 9505309 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 40.

The spelling of 51137077540 in words is "fifty-one billion, one hundred thirty-seven million, seventy-seven thousand, five hundred forty".