51615001111638 has 32 divisors (see below), whose sum is σ = 103804080936192. Its totient is φ = 17109327448800.

The previous prime is 51615001111601. The next prime is 51615001111673. The reversal of 51615001111638 is 83611110051615.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51615001111596 and 51615001111605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29741223 + ... + 31428813.

It is an arithmetic number, because the mean of its divisors is an integer number (3243877529256).

Almost surely, 2^{51615001111638} is an apocalyptic number.

51615001111638 is an abundant number, since it is smaller than the sum of its proper divisors (52189079824554).

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

51615001111638 is a wasteful number, since it uses less digits than its factorization.

51615001111638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715940.

The product of its (nonzero) digits is 21600, while the sum is 39.

The spelling of 51615001111638 in words is "fifty-one trillion, six hundred fifteen billion, one million, one hundred eleven thousand, six hundred thirty-eight".