136721400402 has 32 divisors (see below), whose sum is σ = 282795724800. Its totient is φ = 44039528208.

The previous prime is 136721400373. The next prime is 136721400427. The reversal of 136721400402 is 204004127631.

It is a self number, because there is not a number n which added to its sum of digits gives 136721400402.

It is an unprimeable number.

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, 3046252 + ... + 3090807.

It is an arithmetic number, because the mean of its divisors is an integer number (8837366400).

Almost surely, 2^136721400402 is an apocalyptic number.

136721400402 is an abundant number, since it is smaller than the sum of its proper divisors (146074324398).

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

136721400402 is a wasteful number, since it uses less digits than its factorization.

136721400402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137190.

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 136721400402 in words is "one hundred thirty-six billion, seven hundred twenty-one million, four hundred thousand, four hundred two".