64136381376263 has 16 divisors (see below), whose sum is σ = 74182318296576. Its totient is φ = 54311352202080.

The previous prime is 64136381376247. The next prime is 64136381376271. The reversal of 64136381376263 is 36267318363146.

It is a cyclic number.

It is not a de Polignac number, because 64136381376263 - 2⁴ = 64136381376247 is a prime.

It is a super-2 number, since 2×64136381376263² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64136381376163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131447693 + ... + 131934713.

It is an arithmetic number, because the mean of its divisors is an integer number (4636394893536).

Almost surely, 2^{64136381376263} is an apocalyptic number.

64136381376263 is a deficient number, since it is larger than the sum of its proper divisors (10045936920313).

64136381376263 is a wasteful number, since it uses less digits than its factorization.

64136381376263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713774.

The product of its digits is 47029248, while the sum is 59.

The spelling of 64136381376263 in words is "sixty-four trillion, one hundred thirty-six billion, three hundred eighty-one million, three hundred seventy-six thousand, two hundred sixty-three".