136801781993646 has 96 divisors (see below), whose sum is σ = 373201312813056. Its totient is φ = 35181119160000.

The previous prime is 136801781993627. The next prime is 136801781993677. The reversal of 136801781993646 is 646399187108631.

136801781993646 is a `hidden beast` number, since 1 + 3 + 6 + 8 + 0 + 1 + 78 + 199 + 364 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 488486670 + ... + 488766641.

It is an arithmetic number, because the mean of its divisors is an integer number (3887513675136).

Almost surely, 2^{136801781993646} is an apocalyptic number.

136801781993646 is an abundant number, since it is smaller than the sum of its proper divisors (236399530819410).

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

136801781993646 is a wasteful number, since it uses less digits than its factorization.

136801781993646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977253438 (or 977253435 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 136801781993646 in words is "one hundred thirty-six trillion, eight hundred one billion, seven hundred eighty-one million, nine hundred ninety-three thousand, six hundred forty-six".