26615979000 has 768 divisors, whose sum is σ = 105513408000. Its totient is φ = 6186585600.

The previous prime is 26615978947. The next prime is 26615979149. The reversal of 26615979000 is 97951662.

It is a happy number.

26615979000 is a `hidden beast` number, since 26 + 615 + 9 + 7 + 9 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 86696847 + ... + 86697153.

It is an arithmetic number, because the mean of its divisors is an integer number (137387250).

Almost surely, 2^26615979000 is an apocalyptic number.

26615979000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26615979000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52756704000).

26615979000 is an abundant number, since it is smaller than the sum of its proper divisors (78897429000).

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

26615979000 is a wasteful number, since it uses less digits than its factorization.

26615979000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 26615979000 in words is "twenty-six billion, six hundred fifteen million, nine hundred seventy-nine thousand".