8725217658 has 48 divisors (see below), whose sum is σ = 18435620736. Its totient is φ = 2752580160.

The previous prime is 8725217621. The next prime is 8725217687. The reversal of 8725217658 is 8567125278.

It is a super-2 number, since 2×8725217658² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8725217658.

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, 4051510 + ... + 4053662.

It is an arithmetic number, because the mean of its divisors is an integer number (384075432).

Almost surely, 2^8725217658 is an apocalyptic number.

8725217658 is an abundant number, since it is smaller than the sum of its proper divisors (9710403078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8725217658 is a wasteful number, since it uses less digits than its factorization.

8725217658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067 (or 4048 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 51.

The square root of 8725217658 is about 93408.8735506429. The cubic root of 8725217658 is about 2058.6953798388.

The spelling of 8725217658 in words is "eight billion, seven hundred twenty-five million, two hundred seventeen thousand, six hundred fifty-eight".