100318988557 has 2 divisors, whose sum is σ = 100318988558. Its totient is φ = 100318988556.

The previous prime is 100318988533. The next prime is 100318988597. The reversal of 100318988557 is 755889813001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90356752836 + 9962235721 = 300594^2 + 99811^2 .

It is an emirp because it is prime and its reverse (755889813001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100318988557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100318988498 and 100318988507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100318988597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50159494278 + 50159494279.

It is an arithmetic number, because the mean of its divisors is an integer number (50159494279).

Almost surely, 2^100318988557 is an apocalyptic number.

It is an amenable number.

100318988557 is a deficient number, since it is larger than the sum of its proper divisors (1).

100318988557 is an equidigital number, since it uses as much as digits as its factorization.

100318988557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 55.

The spelling of 100318988557 in words is "one hundred billion, three hundred eighteen million, nine hundred eighty-eight thousand, five hundred fifty-seven".