136394901647 has 4 divisors (see below), whose sum is σ = 140794737216. Its totient is φ = 131995066080.

The previous prime is 136394901637. The next prime is 136394901719. The reversal of 136394901647 is 746109493631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136394901647 - 2⁴ = 136394901631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136394901637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2199917738 + ... + 2199917799.

It is an arithmetic number, because the mean of its divisors is an integer number (35198684304).

Almost surely, 2^136394901647 is an apocalyptic number.

136394901647 is a deficient number, since it is larger than the sum of its proper divisors (4399835569).

136394901647 is an equidigital number, since it uses as much as digits as its factorization.

136394901647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399835568.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 136394901647 in words is "one hundred thirty-six billion, three hundred ninety-four million, nine hundred one thousand, six hundred forty-seven".