64214506091 has 2 divisors, whose sum is σ = 64214506092. Its totient is φ = 64214506090.

The previous prime is 64214506061. The next prime is 64214506117. The reversal of 64214506091 is 19060541246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64214506091 - 2²⁶ = 64147397227 is a prime.

It is a super-2 number, since 2×64214506091² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64214506061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32107253045 + 32107253046.

It is an arithmetic number, because the mean of its divisors is an integer number (32107253046).

Almost surely, 2^64214506091 is an apocalyptic number.

64214506091 is a deficient number, since it is larger than the sum of its proper divisors (1).

64214506091 is an equidigital number, since it uses as much as digits as its factorization.

64214506091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 64214506091 in words is "sixty-four billion, two hundred fourteen million, five hundred six thousand, ninety-one".