25026527509 has 12 divisors (see below), whose sum is σ = 27442872448. Its totient is φ = 22794552000.

The previous prime is 25026527507. The next prime is 25026527587. The reversal of 25026527509 is 90572562052.

It is not a de Polignac number, because 25026527509 - 2¹ = 25026527507 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25026527507) 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, 1387767 + ... + 1405684.

Almost surely, 2^25026527509 is an apocalyptic number.

It is an amenable number.

25026527509 is a deficient number, since it is larger than the sum of its proper divisors (2416344939).

25026527509 is a wasteful number, since it uses less digits than its factorization.

25026527509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793516 (or 2793499 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 25026527509 in words is "twenty-five billion, twenty-six million, five hundred twenty-seven thousand, five hundred nine".