21612616626117 has 16 divisors (see below), whose sum is σ = 31815286691328. Its totient is φ = 12940741607280.

The previous prime is 21612616626103. The next prime is 21612616626151. The reversal of 21612616626117 is 71162661621612.

It is not a de Polignac number, because 21612616626117 - 2⁷ = 21612616625989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612616626187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3945345313 + ... + 3945350790.

It is an arithmetic number, because the mean of its divisors is an integer number (1988455418208).

Almost surely, 2^{21612616626117} is an apocalyptic number.

It is an amenable number.

21612616626117 is a deficient number, since it is larger than the sum of its proper divisors (10202670065211).

21612616626117 is a wasteful number, since it uses less digits than its factorization.

21612616626117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7890696200.

The product of its digits is 435456, while the sum is 48.

The spelling of 21612616626117 in words is "twenty-one trillion, six hundred twelve billion, six hundred sixteen million, six hundred twenty-six thousand, one hundred seventeen".