100405256279 has 2 divisors, whose sum is σ = 100405256280. Its totient is φ = 100405256278.

The previous prime is 100405256257. The next prime is 100405256291. The reversal of 100405256279 is 972652504001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100405256279 - 2⁸ = 100405256023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100405250279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50202628139 + 50202628140.

It is an arithmetic number, because the mean of its divisors is an integer number (50202628140).

Almost surely, 2^100405256279 is an apocalyptic number.

100405256279 is a deficient number, since it is larger than the sum of its proper divisors (1).

100405256279 is an equidigital number, since it uses as much as digits as its factorization.

100405256279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 100405256279 in words is "one hundred billion, four hundred five million, two hundred fifty-six thousand, two hundred seventy-nine".