64631111471 has 2 divisors, whose sum is σ = 64631111472. Its totient is φ = 64631111470.

The previous prime is 64631111431. The next prime is 64631111483. The reversal of 64631111471 is 17411113646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64631111471 - 2³⁰ = 63557369647 is a prime.

It is a super-3 number, since 3×64631111471³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64631111401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32315555735 + 32315555736.

It is an arithmetic number, because the mean of its divisors is an integer number (32315555736).

Almost surely, 2^64631111471 is an apocalyptic number.

64631111471 is a deficient number, since it is larger than the sum of its proper divisors (1).

64631111471 is an equidigital number, since it uses as much as digits as its factorization.

64631111471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The spelling of 64631111471 in words is "sixty-four billion, six hundred thirty-one million, one hundred eleven thousand, four hundred seventy-one".