51651166511156 has 12 divisors (see below), whose sum is σ = 90390050341668. Its totient is φ = 25825437842112.

The previous prime is 51651166511137. The next prime is 51651166511159. The reversal of 51651166511156 is 65111566115615.

It can be written as a sum of positive squares in 2 ways, for example, as 43066852501156 + 8584314010000 = 6562534^2 + 2929900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651166511159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35552201 + ... + 36976496.

It is an arithmetic number, because the mean of its divisors is an integer number (7532504195139).

Almost surely, 2^{51651166511156} is an apocalyptic number.

It is an amenable number.

51651166511156 is a deficient number, since it is larger than the sum of its proper divisors (38738883830512).

51651166511156 is a wasteful number, since it uses less digits than its factorization.

51651166511156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72706738 (or 72706736 counting only the distinct ones).

The product of its digits is 810000, while the sum is 50.

The spelling of 51651166511156 in words is "fifty-one trillion, six hundred fifty-one billion, one hundred sixty-six million, five hundred eleven thousand, one hundred fifty-six".