136321362663251 has 4 divisors (see below), whose sum is σ = 136661316186504. Its totient is φ = 135981409140000.

The previous prime is 136321362663223. The next prime is 136321362663253. The reversal of 136321362663251 is 152366263123631.

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 136321362663251 - 2³⁴ = 136304182794067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136321362663251.

It is not an unprimeable number, because it can be changed into a prime (136321362663253) 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, 169976761025 + ... + 169976761826.

It is an arithmetic number, because the mean of its divisors is an integer number (34165329046626).

Almost surely, 2^{136321362663251} is an apocalyptic number.

136321362663251 is a deficient number, since it is larger than the sum of its proper divisors (339953523253).

136321362663251 is an equidigital number, since it uses as much as digits as its factorization.

136321362663251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339953523252.

The product of its digits is 4199040, while the sum is 50.

The spelling of 136321362663251 in words is "one hundred thirty-six trillion, three hundred twenty-one billion, three hundred sixty-two million, six hundred sixty-three thousand, two hundred fifty-one".