26604992397 has 16 divisors (see below), whose sum is σ = 35743373120. Its totient is φ = 17601743232.

The previous prime is 26604992389. The next prime is 26604992441. The reversal of 26604992397 is 79329940662.

It is a happy number.

It is not a de Polignac number, because 26604992397 - 2³ = 26604992389 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26604992327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1104393 + ... + 1128225.

It is an arithmetic number, because the mean of its divisors is an integer number (2233960820).

Almost surely, 2^26604992397 is an apocalyptic number.

It is an amenable number.

26604992397 is a deficient number, since it is larger than the sum of its proper divisors (9138380723).

26604992397 is a wasteful number, since it uses less digits than its factorization.

26604992397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26652.

The product of its (nonzero) digits is 8817984, while the sum is 57.

The spelling of 26604992397 in words is "twenty-six billion, six hundred four million, nine hundred ninety-two thousand, three hundred ninety-seven".