26686444542 has 32 divisors (see below), whose sum is σ = 53824822272. Its totient is φ = 8820310464.

The previous prime is 26686444507. The next prime is 26686444553. The reversal of 26686444542 is 24544468662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707443 + ... + 744209.

It is an arithmetic number, because the mean of its divisors is an integer number (1682025696).

Almost surely, 2^26686444542 is an apocalyptic number.

26686444542 is an abundant number, since it is smaller than the sum of its proper divisors (27138377730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26686444542 is a wasteful number, since it uses less digits than its factorization.

26686444542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37792.

The product of its digits is 8847360, while the sum is 51.

The spelling of 26686444542 in words is "twenty-six billion, six hundred eighty-six million, four hundred forty-four thousand, five hundred forty-two".