18630002172077 has 2 divisors, whose sum is σ = 18630002172078. Its totient is φ = 18630002172076.

The previous prime is 18630002172049. The next prime is 18630002172233. The reversal of 18630002172077 is 77027120003681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16635540811561 + 1994461360516 = 4078669^2 + 1412254^2 .

It is a cyclic number.

It is not a de Polignac number, because 18630002172077 - 2³⁶ = 18561282695341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18630002175077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9315001086038 + 9315001086039.

It is an arithmetic number, because the mean of its divisors is an integer number (9315001086039).

Almost surely, 2^{18630002172077} is an apocalyptic number.

It is an amenable number.

18630002172077 is a deficient number, since it is larger than the sum of its proper divisors (1).

18630002172077 is an equidigital number, since it uses as much as digits as its factorization.

18630002172077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 18630002172077 in words is "eighteen trillion, six hundred thirty billion, two million, one hundred seventy-two thousand, seventy-seven".