64172427145 has 8 divisors (see below), whose sum is σ = 79491006720. Its totient is φ = 49681878960.

The previous prime is 64172427139. The next prime is 64172427199. The reversal of 64172427145 is 54172427146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64172427145 - 2⁵ = 64172427113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207007675 + ... + 207007984.

It is an arithmetic number, because the mean of its divisors is an integer number (9936375840).

Almost surely, 2^64172427145 is an apocalyptic number.

It is an amenable number.

64172427145 is a deficient number, since it is larger than the sum of its proper divisors (15318579575).

64172427145 is a wasteful number, since it uses less digits than its factorization.

64172427145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414015695.

The product of its digits is 376320, while the sum is 43.

Subtracting from 64172427145 its reverse (54172427146), we obtain a palindrome (9999999999).

The spelling of 64172427145 in words is "sixty-four billion, one hundred seventy-two million, four hundred twenty-seven thousand, one hundred forty-five".