72444644427 has 16 divisors (see below), whose sum is σ = 103250907648. Its totient is φ = 45069837120.

The previous prime is 72444644369. The next prime is 72444644477.

72444644427 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72444644427 - 2¹¹ = 72444642379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72444644477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12801103 + ... + 12806760.

It is an arithmetic number, because the mean of its divisors is an integer number (6453181728).

Almost surely, 2^72444644427 is an apocalyptic number.

72444644427 is a deficient number, since it is larger than the sum of its proper divisors (30806263221).

72444644427 is a wasteful number, since it uses less digits than its factorization.

72444644427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25607930.

The product of its digits is 4816896, while the sum is 48.

The spelling of 72444644427 in words is "seventy-two billion, four hundred forty-four million, six hundred forty-four thousand, four hundred twenty-seven".