136783647920 has 40 divisors (see below), whose sum is σ = 319926335904. Its totient is φ = 54385828352.

The previous prime is 136783647893. The next prime is 136783647941. The reversal of 136783647920 is 29746387631.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5105789 + ... + 5132508.

Almost surely, 2^136783647920 is an apocalyptic number.

136783647920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136783647920 is an abundant number, since it is smaller than the sum of its proper divisors (183142687984).

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

136783647920 is a wasteful number, since it uses less digits than its factorization.

136783647920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10238477 (or 10238471 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 136783647920 in words is "one hundred thirty-six billion, seven hundred eighty-three million, six hundred forty-seven thousand, nine hundred twenty".