8638220525 has 48 divisors (see below), whose sum is σ = 12095225856. Its totient is φ = 6063000000.

The previous prime is 8638220501. The next prime is 8638220579. The reversal of 8638220525 is 5250228368.

It is not a de Polignac number, because 8638220525 - 2¹⁰ = 8638219501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3673100 + ... + 3675450.

It is an arithmetic number, because the mean of its divisors is an integer number (251983872).

Almost surely, 2^8638220525 is an apocalyptic number.

It is an amenable number.

8638220525 is a deficient number, since it is larger than the sum of its proper divisors (3457005331).

8638220525 is a wasteful number, since it uses less digits than its factorization.

8638220525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834 (or 2829 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 8638220525 is about 92942.0277646233. The cubic root of 8638220525 is about 2051.8302532170.

The spelling of 8638220525 in words is "eight billion, six hundred thirty-eight million, two hundred twenty thousand, five hundred twenty-five".