51521561060 has 24 divisors (see below), whose sum is σ = 108280058040. Its totient is φ = 20592475904.

The previous prime is 51521561059. The next prime is 51521561089. The reversal of 51521561060 is 6016512515.

It can be written as a sum of positive squares in 4 ways, for example, as 18734491876 + 32787069184 = 136874^2 + 181072^2 .

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, 983105 + ... + 1034184.

It is an arithmetic number, because the mean of its divisors is an integer number (4511669085).

Almost surely, 2^51521561060 is an apocalyptic number.

It is an amenable number.

51521561060 is an abundant number, since it is smaller than the sum of its proper divisors (56758496980).

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

51521561060 is a wasteful number, since it uses less digits than its factorization.

51521561060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018575 (or 2018573 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 51521561060 in words is "fifty-one billion, five hundred twenty-one million, five hundred sixty-one thousand, sixty".