51011660610 has 96 divisors (see below), whose sum is σ = 136719977472. Its totient is φ = 13186385280.

The previous prime is 51011660561. The next prime is 51011660653. The reversal of 51011660610 is 1606611015.

51011660610 is a `hidden beast` number, since 51 + 0 + 1 + 1 + 6 + 606 + 1 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 874167 + ... + 930693.

It is an arithmetic number, because the mean of its divisors is an integer number (1424166432).

Almost surely, 2^51011660610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51011660610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68359988736).

51011660610 is an abundant number, since it is smaller than the sum of its proper divisors (85708316862).

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

51011660610 is a wasteful number, since it uses less digits than its factorization.

51011660610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56848 (or 56845 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 51011660610 in words is "fifty-one billion, eleven million, six hundred sixty thousand, six hundred ten".