51611015610 has 192 divisors, whose sum is σ = 168271084800. Its totient is φ = 10662128640.

The previous prime is 51611015609. The next prime is 51611015627. The reversal of 51611015610 is 1651011615.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1177366 + ... + 1220414.

It is an arithmetic number, because the mean of its divisors is an integer number (876411900).

Almost surely, 2^51611015610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51611015610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84135542400).

51611015610 is an abundant number, since it is smaller than the sum of its proper divisors (116660069190).

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

51611015610 is a wasteful number, since it uses less digits than its factorization.

51611015610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43253 (or 43250 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 51611015610 in words is "fifty-one billion, six hundred eleven million, fifteen thousand, six hundred ten".