51061561500530 has 64 divisors (see below), whose sum is σ = 105515734302720. Its totient is φ = 17427692078784.

The previous prime is 51061561500497. The next prime is 51061561500569. The reversal of 51061561500530 is 3500516516015.

It is a super-3 number, since 3×51061561500530³ (a number of 42 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 722816951 + ... + 722887589.

It is an arithmetic number, because the mean of its divisors is an integer number (1648683348480).

Almost surely, 2^{51061561500530} is an apocalyptic number.

51061561500530 is an abundant number, since it is smaller than the sum of its proper divisors (54454172802190).

51061561500530 is a wasteful number, since it uses less digits than its factorization.

51061561500530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117183.

The product of its (nonzero) digits is 67500, while the sum is 38.

The spelling of 51061561500530 in words is "fifty-one trillion, sixty-one billion, five hundred sixty-one million, five hundred thousand, five hundred thirty".