100878512017 has 2 divisors, whose sum is σ = 100878512018. Its totient is φ = 100878512016.

The previous prime is 100878511969. The next prime is 100878512047. The reversal of 100878512017 is 710215878001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98425885441 + 2452626576 = 313729^2 + 49524^2 .

It is a cyclic number.

It is not a de Polignac number, because 100878512017 - 2³¹ = 98731028369 is a prime.

It is not a weakly prime, because it can be changed into another prime (100878512047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50439256008 + 50439256009.

It is an arithmetic number, because the mean of its divisors is an integer number (50439256009).

Almost surely, 2^100878512017 is an apocalyptic number.

It is an amenable number.

100878512017 is a deficient number, since it is larger than the sum of its proper divisors (1).

100878512017 is an equidigital number, since it uses as much as digits as its factorization.

100878512017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 40.

The spelling of 100878512017 in words is "one hundred billion, eight hundred seventy-eight million, five hundred twelve thousand, seventeen".