136994668520 has 32 divisors (see below), whose sum is σ = 308619088200. Its totient is φ = 54730119168.

The previous prime is 136994668519. The next prime is 136994668537. The reversal of 136994668520 is 25866499631.

It can be written as a sum of positive squares in 4 ways, for example, as 95482236004 + 41512432516 = 309002^2 + 203746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 136994668520.

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 7 ways as a sum of consecutive naturals, for example, 2084369 + ... + 2149088.

Almost surely, 2^136994668520 is an apocalyptic number.

136994668520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136994668520 is an abundant number, since it is smaller than the sum of its proper divisors (171624419680).

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

136994668520 is a wasteful number, since it uses less digits than its factorization.

136994668520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234277 (or 4234273 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 136994668520 in words is "one hundred thirty-six billion, nine hundred ninety-four million, six hundred sixty-eight thousand, five hundred twenty".