26615988280 has 32 divisors (see below), whose sum is σ = 68441113440. Its totient is φ = 9125481600.

The previous prime is 26615988251. The next prime is 26615988283. The reversal of 26615988280 is 8288951662.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26615988283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47528271 + ... + 47528830.

It is an arithmetic number, because the mean of its divisors is an integer number (2138784795).

Almost surely, 2^26615988280 is an apocalyptic number.

26615988280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26615988280 is an abundant number, since it is smaller than the sum of its proper divisors (41825125160).

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

26615988280 is a wasteful number, since it uses less digits than its factorization.

26615988280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95057119 (or 95057115 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 26615988280 in words is "twenty-six billion, six hundred fifteen million, nine hundred eighty-eight thousand, two hundred eighty".