136810121988 has 12 divisors (see below), whose sum is σ = 319223618000. Its totient is φ = 45603373992.

The previous prime is 136810121983. The next prime is 136810121989. The reversal of 136810121988 is 889121018631.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (136810121983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5700421738 + ... + 5700421761.

Almost surely, 2^136810121988 is an apocalyptic number.

It is an amenable number.

136810121988 is an abundant number, since it is smaller than the sum of its proper divisors (182413496012).

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

136810121988 is a wasteful number, since it uses less digits than its factorization.

136810121988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11400843506 (or 11400843504 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 48.

The spelling of 136810121988 in words is "one hundred thirty-six billion, eight hundred ten million, one hundred twenty-one thousand, nine hundred eighty-eight".