26502640155 has 16 divisors (see below), whose sum is σ = 47115804960. Its totient is φ = 14134741344.

The previous prime is 26502640141. The next prime is 26502640163. The reversal of 26502640155 is 55104620562.

26502640155 is a `hidden beast` number, since 2 + 6 + 5 + 0 + 2 + 640 + 1 + 5 + 5 = 666.

It is not a de Polignac number, because 26502640155 - 2⁴ = 26502640139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98157792 + ... + 98158061.

It is an arithmetic number, because the mean of its divisors is an integer number (2944737810).

Almost surely, 2^26502640155 is an apocalyptic number.

26502640155 is a deficient number, since it is larger than the sum of its proper divisors (20613164805).

26502640155 is a wasteful number, since it uses less digits than its factorization.

26502640155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196315867 (or 196315861 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 26502640155 in words is "twenty-six billion, five hundred two million, six hundred forty thousand, one hundred fifty-five".