26690491616 has 24 divisors (see below), whose sum is σ = 52573961664. Its totient is φ = 13338374400.

The previous prime is 26690491609. The next prime is 26690491669. The reversal of 26690491616 is 61619409662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151325 + ... + 276188.

It is an arithmetic number, because the mean of its divisors is an integer number (2190581736).

Almost surely, 2^26690491616 is an apocalyptic number.

It is an amenable number.

26690491616 is a deficient number, since it is larger than the sum of its proper divisors (25883470048).

26690491616 is a wasteful number, since it uses less digits than its factorization.

26690491616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429474 (or 429466 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 26690491616 in words is "twenty-six billion, six hundred ninety million, four hundred ninety-one thousand, six hundred sixteen".