18616677701 has 2 divisors, whose sum is σ = 18616677702. Its totient is φ = 18616677700.

The previous prime is 18616677697. The next prime is 18616677707. The reversal of 18616677701 is 10777661681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10909593601 + 7707084100 = 104449^2 + 87790^2 .

It is a cyclic number.

It is not a de Polignac number, because 18616677701 - 2² = 18616677697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18616677701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18616677707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9308338850 + 9308338851.

It is an arithmetic number, because the mean of its divisors is an integer number (9308338851).

Almost surely, 2^18616677701 is an apocalyptic number.

It is an amenable number.

18616677701 is a deficient number, since it is larger than the sum of its proper divisors (1).

18616677701 is an equidigital number, since it uses as much as digits as its factorization.

18616677701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 50.

The spelling of 18616677701 in words is "eighteen billion, six hundred sixteen million, six hundred seventy-seven thousand, seven hundred one".