8157561677500 has 60 divisors (see below), whose sum is σ = 17839699000200. Its totient is φ = 3262888744000.

The previous prime is 8157561677491. The next prime is 8157561677533. The reversal of 8157561677500 is 57761657518.

It is a super-2 number, since 2×8157561677500² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77795106 + ... + 77899894.

It is an arithmetic number, because the mean of its divisors is an integer number (297328316670).

Almost surely, 2^{8157561677500} is an apocalyptic number.

It is an amenable number.

8157561677500 is an abundant number, since it is smaller than the sum of its proper divisors (9682137322700).

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

8157561677500 is a wasteful number, since it uses less digits than its factorization.

8157561677500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135952 (or 135935 counting only the distinct ones).

The product of its (nonzero) digits is 12348000, while the sum is 58.

The spelling of 8157561677500 in words is "eight trillion, one hundred fifty-seven billion, five hundred sixty-one million, six hundred seventy-seven thousand, five hundred".