100778634577 has 2 divisors, whose sum is σ = 100778634578. Its totient is φ = 100778634576.

The previous prime is 100778634533. The next prime is 100778634613. The reversal of 100778634577 is 775436877001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100584756801 + 193877776 = 317151^2 + 13924^2 .

It is a cyclic number.

It is not a de Polignac number, because 100778634577 - 2³¹ = 98631150929 is a prime.

It is not a weakly prime, because it can be changed into another prime (100778635577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50389317288 + 50389317289.

It is an arithmetic number, because the mean of its divisors is an integer number (50389317289).

Almost surely, 2^100778634577 is an apocalyptic number.

It is an amenable number.

100778634577 is a deficient number, since it is larger than the sum of its proper divisors (1).

100778634577 is an equidigital number, since it uses as much as digits as its factorization.

100778634577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6914880, while the sum is 55.

The spelling of 100778634577 in words is "one hundred billion, seven hundred seventy-eight million, six hundred thirty-four thousand, five hundred seventy-seven".