100972561157639 has 2 divisors, whose sum is σ = 100972561157640. Its totient is φ = 100972561157638.

The previous prime is 100972561157599. The next prime is 100972561157651. The reversal of 100972561157639 is 936751165279001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100972561157639 - 2²⁰ = 100972560109063 is a prime.

It is a super-2 number, since 2×100972561157639² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100972561156639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50486280578819 + 50486280578820.

It is an arithmetic number, because the mean of its divisors is an integer number (50486280578820).

Almost surely, 2^{100972561157639} is an apocalyptic number.

100972561157639 is a deficient number, since it is larger than the sum of its proper divisors (1).

100972561157639 is an equidigital number, since it uses as much as digits as its factorization.

100972561157639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21432600, while the sum is 62.

The spelling of 100972561157639 in words is "one hundred trillion, nine hundred seventy-two billion, five hundred sixty-one million, one hundred fifty-seven thousand, six hundred thirty-nine".