11636640525 has 24 divisors (see below), whose sum is σ = 19246749280. Its totient is φ = 6203787840.

The previous prime is 11636640481. The next prime is 11636640571. The reversal of 11636640525 is 52504663611.

It is not a de Polignac number, because 11636640525 - 2¹⁵ = 11636607757 is a prime.

It is a super-2 number, since 2×11636640525² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172311 + ... + 230139.

Almost surely, 2^11636640525 is an apocalyptic number.

11636640525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11636640525 is a deficient number, since it is larger than the sum of its proper divisors (7610108755).

11636640525 is a wasteful number, since it uses less digits than its factorization.

11636640525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60525 (or 60520 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 11636640525 in words is "eleven billion, six hundred thirty-six million, six hundred forty thousand, five hundred twenty-five".