136721400393 has 16 divisors (see below), whose sum is σ = 187565233856. Its totient is φ = 88536006720.

The previous prime is 136721400373. The next prime is 136721400427. The reversal of 136721400393 is 393004127631.

It is not a de Polignac number, because 136721400393 - 2⁶ = 136721400329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136721400373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2904430 + ... + 2951127.

It is an arithmetic number, because the mean of its divisors is an integer number (11722827116).

Almost surely, 2^136721400393 is an apocalyptic number.

It is an amenable number.

136721400393 is a deficient number, since it is larger than the sum of its proper divisors (50843833463).

136721400393 is a wasteful number, since it uses less digits than its factorization.

136721400393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855784.

The product of its (nonzero) digits is 81648, while the sum is 39.

The spelling of 136721400393 in words is "one hundred thirty-six billion, seven hundred twenty-one million, four hundred thousand, three hundred ninety-three".