8621551725 has 24 divisors (see below), whose sum is σ = 14874053952. Its totient is φ = 4398240000.

The previous prime is 8621551721. The next prime is 8621551747. The reversal of 8621551725 is 5271551268.

It is not a de Polignac number, because 8621551725 - 2² = 8621551721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8621551721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2497276 + ... + 2500725.

It is an arithmetic number, because the mean of its divisors is an integer number (619752248).

Almost surely, 2^8621551725 is an apocalyptic number.

It is an amenable number.

8621551725 is a deficient number, since it is larger than the sum of its proper divisors (6252502227).

8621551725 is a wasteful number, since it uses less digits than its factorization.

8621551725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998037 (or 4998032 counting only the distinct ones).

The product of its digits is 168000, while the sum is 42.

The square root of 8621551725 is about 92852.3113605687. The cubic root of 8621551725 is about 2050.5096274114.

The spelling of 8621551725 in words is "eight billion, six hundred twenty-one million, five hundred fifty-one thousand, seven hundred twenty-five".