100405256449 has 4 divisors (see below), whose sum is σ = 100474646464. Its totient is φ = 100335866436.

The previous prime is 100405256443. The next prime is 100405256521. The reversal of 100405256449 is 944652504001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100405256449 - 2⁵ = 100405256417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100405256443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34692837 + ... + 34695730.

It is an arithmetic number, because the mean of its divisors is an integer number (25118661616).

Almost surely, 2^100405256449 is an apocalyptic number.

It is an amenable number.

100405256449 is a deficient number, since it is larger than the sum of its proper divisors (69390015).

100405256449 is an equidigital number, since it uses as much as digits as its factorization.

100405256449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69390014.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 100405256449 in words is "one hundred billion, four hundred five million, two hundred fifty-six thousand, four hundred forty-nine".