26506616604 has 48 divisors (see below), whose sum is σ = 68230932000. Its totient is φ = 7956956160.

The previous prime is 26506616551. The next prime is 26506616611. The reversal of 26506616604 is 40661660562.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 2065729 + ... + 2078520.

It is an arithmetic number, because the mean of its divisors is an integer number (1421477750).

Almost surely, 2^26506616604 is an apocalyptic number.

It is an amenable number.

26506616604 is an abundant number, since it is smaller than the sum of its proper divisors (41724315396).

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

26506616604 is a wasteful number, since it uses less digits than its factorization.

26506616604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144310 (or 4144308 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 26506616604 in words is "twenty-six billion, five hundred six million, six hundred sixteen thousand, six hundred four".