426640137679 has 32 divisors (see below), whose sum is σ = 522162101376. Its totient is φ = 340262707200.

The previous prime is 426640137661. The next prime is 426640137719. The reversal of 426640137679 is 976731046624.

It is a cyclic number.

It is not a de Polignac number, because 426640137679 - 2⁷ = 426640137551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426640137619) 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, 8110647 + ... + 8163079.

It is an arithmetic number, because the mean of its divisors is an integer number (16317565668).

Almost surely, 2^426640137679 is an apocalyptic number.

426640137679 is a deficient number, since it is larger than the sum of its proper divisors (95521963697).

426640137679 is a wasteful number, since it uses less digits than its factorization.

426640137679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53235.

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 426640137679 in words is "four hundred twenty-six billion, six hundred forty million, one hundred thirty-seven thousand, six hundred seventy-nine".