136931809850 has 72 divisors (see below), whose sum is σ = 292124115360. Its totient is φ = 47628407200.

The previous prime is 136931809849. The next prime is 136931809879. The reversal of 136931809850 is 58908139631.

It is a junction number, because it is equal to n+sod(n) for n = 136931809792 and 136931809801.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 352880 + ... + 631179.

It is an arithmetic number, because the mean of its divisors is an integer number (4057279380).

Almost surely, 2^136931809850 is an apocalyptic number.

136931809850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136931809850 is an abundant number, since it is smaller than the sum of its proper divisors (155192305510).

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

136931809850 is a wasteful number, since it uses less digits than its factorization.

136931809850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984116 (or 984100 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 136931809850 in words is "one hundred thirty-six billion, nine hundred thirty-one million, eight hundred nine thousand, eight hundred fifty".