64506036269 has 2 divisors, whose sum is σ = 64506036270. Its totient is φ = 64506036268.

The previous prime is 64506036263. The next prime is 64506036271. The reversal of 64506036269 is 96263060546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48827740900 + 15678295369 = 220970^2 + 125213^2 .

It is a cyclic number.

It is not a de Polignac number, because 64506036269 - 2²⁴ = 64489259053 is a prime.

It is a super-2 number, since 2×64506036269² (a number of 22 digits) contains 22 as substring.

Together with 64506036271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64506036263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32253018134 + 32253018135.

It is an arithmetic number, because the mean of its divisors is an integer number (32253018135).

Almost surely, 2^64506036269 is an apocalyptic number.

It is an amenable number.

64506036269 is a deficient number, since it is larger than the sum of its proper divisors (1).

64506036269 is an equidigital number, since it uses as much as digits as its factorization.

64506036269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 64506036269 in words is "sixty-four billion, five hundred six million, thirty-six thousand, two hundred sixty-nine".