51502008560 has 20 divisors (see below), whose sum is σ = 119742170088. Its totient is φ = 20600803392.

The previous prime is 51502008529. The next prime is 51502008647. The reversal of 51502008560 is 6580020515.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321887474 + ... + 321887633.

Almost surely, 2^51502008560 is an apocalyptic number.

It is an amenable number.

51502008560 is an abundant number, since it is smaller than the sum of its proper divisors (68240161528).

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

51502008560 is a wasteful number, since it uses less digits than its factorization.

51502008560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643775120 (or 643775114 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 51502008560 in words is "fifty-one billion, five hundred two million, eight thousand, five hundred sixty".