26513145525 has 12 divisors (see below), whose sum is σ = 43835067392. Its totient is φ = 14140344240.

The previous prime is 26513145521. The next prime is 26513145553. The reversal of 26513145525 is 52554131562.

It is not a de Polignac number, because 26513145525 - 2² = 26513145521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26513145521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176754229 + ... + 176754378.

Almost surely, 2^26513145525 is an apocalyptic number.

26513145525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26513145525 is a deficient number, since it is larger than the sum of its proper divisors (17321921867).

26513145525 is a wasteful number, since it uses less digits than its factorization.

26513145525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353508620 (or 353508615 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The spelling of 26513145525 in words is "twenty-six billion, five hundred thirteen million, one hundred forty-five thousand, five hundred twenty-five".