26505116297520 has 160 divisors (see below), whose sum is σ = 95495431472640. Its totient is φ = 5955629015040.

The previous prime is 26505116297477. The next prime is 26505116297521. The reversal of 26505116297520 is 2579261150562.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26505116297521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133603041 + ... + 133801280.

It is an arithmetic number, because the mean of its divisors is an integer number (596846446704).

Almost surely, 2^{26505116297520} is an apocalyptic number.

26505116297520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26505116297520 is an abundant number, since it is smaller than the sum of its proper divisors (68990315175120).

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

26505116297520 is a wasteful number, since it uses less digits than its factorization.

26505116297520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267404403 (or 267404397 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 51.

The spelling of 26505116297520 in words is "twenty-six trillion, five hundred five billion, one hundred sixteen million, two hundred ninety-seven thousand, five hundred twenty".