426440691279 has 32 divisors (see below), whose sum is σ = 645277763840. Its totient is φ = 278266656096.

The previous prime is 426440691277. The next prime is 426440691289. The reversal of 426440691279 is 972196044624.

426440691279 is a `hidden beast` number, since 42 + 6 + 440 + 6 + 91 + 2 + 79 = 666.

426440691279 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 426440691279 - 2¹ = 426440691277 is a prime.

It is a super-2 number, since 2×426440691279² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426440691277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466729 + ... + 1034754.

It is an arithmetic number, because the mean of its divisors is an integer number (20164930120).

Almost surely, 2^426440691279 is an apocalyptic number.

426440691279 is a deficient number, since it is larger than the sum of its proper divisors (218837072561).

426440691279 is a wasteful number, since it uses less digits than its factorization.

426440691279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501716 (or 1501710 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 426440691279 in words is "four hundred twenty-six billion, four hundred forty million, six hundred ninety-one thousand, two hundred seventy-nine".