26400520325 has 12 divisors (see below), whose sum is σ = 33354319428. Its totient is φ = 20721916800.

The previous prime is 26400520319. The next prime is 26400520403. The reversal of 26400520325 is 52302500462.

It can be written as a sum of positive squares in 6 ways, for example, as 674285089 + 25726235236 = 25967^2 + 160394^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26400520325 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9961136 + ... + 9963785.

It is an arithmetic number, because the mean of its divisors is an integer number (2779526619).

Almost surely, 2^26400520325 is an apocalyptic number.

26400520325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26400520325 is a deficient number, since it is larger than the sum of its proper divisors (6953799103).

26400520325 is a wasteful number, since it uses less digits than its factorization.

26400520325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19924984 (or 19924979 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 26400520325 in words is "twenty-six billion, four hundred million, five hundred twenty thousand, three hundred twenty-five".