136721400431 has 8 divisors (see below), whose sum is σ = 170457849984. Its totient is φ = 106536156120.

The previous prime is 136721400427. The next prime is 136721400443. The reversal of 136721400431 is 134004127631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136721400431 - 2² = 136721400427 is a prime.

It is a super-2 number, since 2×136721400431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136721400631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887801225 + ... + 887801378.

It is an arithmetic number, because the mean of its divisors is an integer number (21307231248).

Almost surely, 2^136721400431 is an apocalyptic number.

136721400431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136721400431 is a deficient number, since it is larger than the sum of its proper divisors (33736449553).

136721400431 is a wasteful number, since it uses less digits than its factorization.

136721400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775602621.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 136721400431 in words is "one hundred thirty-six billion, seven hundred twenty-one million, four hundred thousand, four hundred thirty-one".