51263606140 has 24 divisors (see below), whose sum is σ = 109128282480. Its totient is φ = 20224545408.

The previous prime is 51263606123. The next prime is 51263606171. The reversal of 51263606140 is 4160636215.

It is a junction number, because it is equal to n+sod(n) for n = 51263606096 and 51263606105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17554570 + ... + 17557489.

It is an arithmetic number, because the mean of its divisors is an integer number (4547011770).

Almost surely, 2^51263606140 is an apocalyptic number.

It is an amenable number.

51263606140 is an abundant number, since it is smaller than the sum of its proper divisors (57864676340).

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

51263606140 is a wasteful number, since it uses less digits than its factorization.

51263606140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35112141 (or 35112139 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 51263606140 in words is "fifty-one billion, two hundred sixty-three million, six hundred six thousand, one hundred forty".