64172427147 has 20 divisors (see below), whose sum is σ = 95869531296. Its totient is φ = 42778486800.

The previous prime is 64172427139. The next prime is 64172427199. The reversal of 64172427147 is 74172427146.

It is not a de Polignac number, because 64172427147 - 2³ = 64172427139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64172427047) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1767022 + ... + 1802972.

Almost surely, 2^64172427147 is an apocalyptic number.

64172427147 is a deficient number, since it is larger than the sum of its proper divisors (31697104149).

64172427147 is a wasteful number, since it uses less digits than its factorization.

64172427147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58000 (or 57991 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

Subtracting 64172427147 from its reverse (74172427146), we obtain a palindrome (9999999999).

The spelling of 64172427147 in words is "sixty-four billion, one hundred seventy-two million, four hundred twenty-seven thousand, one hundred forty-seven".