72744977944727 has 4 divisors (see below), whose sum is σ = 79358157757896. Its totient is φ = 66131798131560.

The previous prime is 72744977944697. The next prime is 72744977944757.

72744977944727 is nontrivially palindromic in base 10.

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

It is an interprime number because it is at equal distance from previous prime (72744977944697) and next prime (72744977944757).

It is a cyclic number.

It is not a de Polignac number, because 72744977944727 - 2²⁴ = 72744961167511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72744977944757) 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, 3306589906568 + ... + 3306589906589.

It is an arithmetic number, because the mean of its divisors is an integer number (19839539439474).

Almost surely, 2^{72744977944727} is an apocalyptic number.

72744977944727 is a deficient number, since it is larger than the sum of its proper divisors (6613179813169).

72744977944727 is a wasteful number, since it uses less digits than its factorization.

72744977944727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6613179813168.

The product of its digits is 9758278656, while the sum is 80.

The spelling of 72744977944727 in words is "seventy-two trillion, seven hundred forty-four billion, nine hundred seventy-seven million, nine hundred forty-four thousand, seven hundred twenty-seven".