64912228191 has 6 divisors (see below), whose sum is σ = 93762107400. Its totient is φ = 43274818788.

The previous prime is 64912228177. The next prime is 64912228207. The reversal of 64912228191 is 19182221946.

It is a happy number.

It is not a de Polignac number, because 64912228191 - 2⁷ = 64912228063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64912228151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3606234891 + ... + 3606234908.

It is an arithmetic number, because the mean of its divisors is an integer number (15627017900).

Almost surely, 2^64912228191 is an apocalyptic number.

64912228191 is a deficient number, since it is larger than the sum of its proper divisors (28849879209).

64912228191 is a wasteful number, since it uses less digits than its factorization.

64912228191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7212469805 (or 7212469802 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The spelling of 64912228191 in words is "sixty-four billion, nine hundred twelve million, two hundred twenty-eight thousand, one hundred ninety-one".