136985457816 has 48 divisors (see below), whose sum is σ = 382970103360. Its totient is φ = 44188856640.

The previous prime is 136985457799. The next prime is 136985457859. The reversal of 136985457816 is 618754589631.

136985457816 is a `hidden beast` number, since 1 + 3 + 6 + 9 + 8 + 54 + 578 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30684475 + ... + 30688938.

It is an arithmetic number, because the mean of its divisors is an integer number (7978543820).

Almost surely, 2^136985457816 is an apocalyptic number.

It is an amenable number.

136985457816 is an abundant number, since it is smaller than the sum of its proper divisors (245984645544).

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

136985457816 is a wasteful number, since it uses less digits than its factorization.

136985457816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61373456 (or 61373449 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 136985457816 in words is "one hundred thirty-six billion, nine hundred eighty-five million, four hundred fifty-seven thousand, eight hundred sixteen".