51134440140 has 72 divisors (see below), whose sum is σ = 177266063520. Its totient is φ = 11687871744.

The previous prime is 51134440111. The next prime is 51134440183. The reversal of 51134440140 is 4104443115.

51134440140 is a `hidden beast` number, since 51 + 1 + 34 + 440 + 140 = 666.

It is a super-2 number, since 2×51134440140² (a number of 22 digits) contains 22 as substring.

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, 20290185 + ... + 20292704.

It is an arithmetic number, because the mean of its divisors is an integer number (2462028660).

Almost surely, 2^51134440140 is an apocalyptic number.

It is an amenable number.

51134440140 is an abundant number, since it is smaller than the sum of its proper divisors (126131623380).

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

51134440140 is a wasteful number, since it uses less digits than its factorization.

51134440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40582911 (or 40582906 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 51134440140 its reverse (4104443115), we get a palindrome (55238883255).

The spelling of 51134440140 in words is "fifty-one billion, one hundred thirty-four million, four hundred forty thousand, one hundred forty".