26117009538 has 32 divisors (see below), whose sum is σ = 53482740480. Its totient is φ = 8498503680.

The previous prime is 26117009533. The next prime is 26117009539. The reversal of 26117009538 is 83590071162.

It is a self number, because there is not a number n which added to its sum of digits gives 26117009538.

It is not an unprimeable number, because it can be changed into a prime (26117009533) 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, 9343 + ... + 228738.

It is an arithmetic number, because the mean of its divisors is an integer number (1671335640).

Almost surely, 2^26117009538 is an apocalyptic number.

26117009538 is an abundant number, since it is smaller than the sum of its proper divisors (27365730942).

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

26117009538 is a wasteful number, since it uses less digits than its factorization.

26117009538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238522.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 26117009538 in words is "twenty-six billion, one hundred seventeen million, nine thousand, five hundred thirty-eight".