279800947491 has 16 divisors (see below), whose sum is σ = 403248007680. Its totient is φ = 171549822240.

The previous prime is 279800947477. The next prime is 279800947493. The reversal of 279800947491 is 194749008972.

It is not a de Polignac number, because 279800947491 - 2²⁶ = 279733838627 is a prime.

It is a super-2 number, since 2×279800947491² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (279800947493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13226301 + ... + 13247438.

It is an arithmetic number, because the mean of its divisors is an integer number (25203000480).

Almost surely, 2^279800947491 is an apocalyptic number.

279800947491 is a deficient number, since it is larger than the sum of its proper divisors (123447060189).

279800947491 is a wasteful number, since it uses less digits than its factorization.

279800947491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26474026.

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 279800947491 in words is "two hundred seventy-nine billion, eight hundred million, nine hundred forty-seven thousand, four hundred ninety-one".