8557861382500 has 30 divisors (see below), whose sum is σ = 18714331276718. Its totient is φ = 3423144552000.

The previous prime is 8557861382471. The next prime is 8557861382509. The reversal of 8557861382500 is 52831687558.

It can be written as a sum of positive squares in 5 ways, for example, as 4215605601636 + 4342255780864 = 2053194^2 + 2083808^2 .

It is a super-2 number, since 2×8557861382500² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8557861382509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1711569777 + ... + 1711574776.

Almost surely, 2^{8557861382500} is an apocalyptic number.

It is an amenable number.

8557861382500 is an abundant number, since it is smaller than the sum of its proper divisors (10156469894218).

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

8557861382500 is a wasteful number, since it uses less digits than its factorization.

8557861382500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423144577 (or 3423144560 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 58.

The spelling of 8557861382500 in words is "eight trillion, five hundred fifty-seven billion, eight hundred sixty-one million, three hundred eighty-two thousand, five hundred".