51660961156 has 96 divisors (see below), whose sum is σ = 110798053632. Its totient is φ = 20573429760.

The previous prime is 51660961151. The next prime is 51660961159. The reversal of 51660961156 is 65116906615.

It is not an unprimeable number, because it can be changed into a prime (51660961151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12179196 + ... + 12183436.

It is an arithmetic number, because the mean of its divisors is an integer number (1154146392).

Almost surely, 2^51660961156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51660961156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55399026816).

51660961156 is an abundant number, since it is smaller than the sum of its proper divisors (59137092476).

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

51660961156 is a wasteful number, since it uses less digits than its factorization.

51660961156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589 (or 4587 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 51660961156 in words is "fifty-one billion, six hundred sixty million, nine hundred sixty-one thousand, one hundred fifty-six".