26706431431 has 4 divisors (see below), whose sum is σ = 26706758512. Its totient is φ = 26706104352.

The previous prime is 26706431399. The next prime is 26706431447. The reversal of 26706431431 is 13413460762.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26706431431 - 2⁵ = 26706431399 is a prime.

It is a super-2 number, since 2×26706431431² (a number of 22 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 (26706431461) 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, 72415 + ... + 242191.

It is an arithmetic number, because the mean of its divisors is an integer number (6676689628).

Almost surely, 2^26706431431 is an apocalyptic number.

26706431431 is a deficient number, since it is larger than the sum of its proper divisors (327081).

26706431431 is a wasteful number, since it uses less digits than its factorization.

26706431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327080.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 26706431431 in words is "twenty-six billion, seven hundred six million, four hundred thirty-one thousand, four hundred thirty-one".