26515072540 has 24 divisors (see below), whose sum is σ = 60743621232. Its totient is φ = 9641844480.

The previous prime is 26515072537. The next prime is 26515072541. The reversal of 26515072540 is 4527051562.

It is a self number, because there is not a number n which added to its sum of digits gives 26515072540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26515072541) 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, 60261309 + ... + 60261748.

It is an arithmetic number, because the mean of its divisors is an integer number (2530984218).

Almost surely, 2^26515072540 is an apocalyptic number.

26515072540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26515072540 is an abundant number, since it is smaller than the sum of its proper divisors (34228548692).

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

26515072540 is a wasteful number, since it uses less digits than its factorization.

26515072540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120523077 (or 120523075 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 26515072540 in words is "twenty-six billion, five hundred fifteen million, seventy-two thousand, five hundred forty".