21612616626116 has 6 divisors (see below), whose sum is σ = 37822079095710. Its totient is φ = 10806308313056.

The previous prime is 21612616626103. The next prime is 21612616626151. The reversal of 21612616626116 is 61162661621612.

It can be written as a sum of positive squares in only one way, i.e., 16226717497600 + 5385899128516 = 4028240^2 + 2320754^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2701577078261 + ... + 2701577078268.

It is an arithmetic number, because the mean of its divisors is an integer number (6303679849285).

Almost surely, 2^{21612616626116} is an apocalyptic number.

It is an amenable number.

21612616626116 is a deficient number, since it is larger than the sum of its proper divisors (16209462469594).

21612616626116 is a wasteful number, since it uses less digits than its factorization.

21612616626116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403154156533 (or 5403154156531 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The spelling of 21612616626116 in words is "twenty-one trillion, six hundred twelve billion, six hundred sixteen million, six hundred twenty-six thousand, one hundred sixteen".