26138502628 has 24 divisors (see below), whose sum is σ = 54549919872. Its totient is φ = 10715162304.

The previous prime is 26138502589. The next prime is 26138502641. The reversal of 26138502628 is 82620583162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20293225 + ... + 20294512.

It is an arithmetic number, because the mean of its divisors is an integer number (2272913328).

Almost surely, 2^26138502628 is an apocalyptic number.

26138502628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26138502628 is an abundant number, since it is smaller than the sum of its proper divisors (28411417244).

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

26138502628 is a wasteful number, since it uses less digits than its factorization.

26138502628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40587771 (or 40587769 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 26138502628 in words is "twenty-six billion, one hundred thirty-eight million, five hundred two thousand, six hundred twenty-eight".