51651501560540 has 24 divisors (see below), whose sum is σ = 123963603745632. Its totient is φ = 17709086249280.

The previous prime is 51651501560509. The next prime is 51651501560569. The reversal of 51651501560540 is 4506510515615.

It is a super-2 number, since 2×51651501560540² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51651501560491 and 51651501560500.

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, 184469648291 + ... + 184469648570.

It is an arithmetic number, because the mean of its divisors is an integer number (5165150156068).

Almost surely, 2^{51651501560540} is an apocalyptic number.

It is an amenable number.

51651501560540 is an abundant number, since it is smaller than the sum of its proper divisors (72312102185092).

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

51651501560540 is a wasteful number, since it uses less digits than its factorization.

51651501560540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368939296877 (or 368939296875 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 44.

The spelling of 51651501560540 in words is "fifty-one trillion, six hundred fifty-one billion, five hundred one million, five hundred sixty thousand, five hundred forty".