64172427146 has 4 divisors (see below), whose sum is σ = 96258640722. Its totient is φ = 32086213572.

The previous prime is 64172427139. The next prime is 64172427199.

64172427146 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39984401521 + 24188025625 = 199961^2 + 155525^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64172427097 and 64172427106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16043106785 + ... + 16043106788.

Almost surely, 2^64172427146 is an apocalyptic number.

64172427146 is a deficient number, since it is larger than the sum of its proper divisors (32086213576).

64172427146 is a wasteful number, since it uses less digits than its factorization.

64172427146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32086213575.

The product of its digits is 451584, while the sum is 44.

The spelling of 64172427146 in words is "sixty-four billion, one hundred seventy-two million, four hundred twenty-seven thousand, one hundred forty-six".