64444442529 has 4 divisors (see below), whose sum is σ = 85925923376. Its totient is φ = 42962961684.

The previous prime is 64444442521. The next prime is 64444442539. The reversal of 64444442529 is 92524444446.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64444442529 - 2³ = 64444442521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64444442521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10740740419 + ... + 10740740424.

It is an arithmetic number, because the mean of its divisors is an integer number (21481480844).

Almost surely, 2^64444442529 is an apocalyptic number.

It is an amenable number.

64444442529 is a deficient number, since it is larger than the sum of its proper divisors (21481480847).

64444442529 is a wasteful number, since it uses less digits than its factorization.

64444442529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21481480846.

The product of its digits is 4423680, while the sum is 48.

The spelling of 64444442529 in words is "sixty-four billion, four hundred forty-four million, four hundred forty-two thousand, five hundred twenty-nine".