72800544977 has 4 divisors (see below), whose sum is σ = 73993996596. Its totient is φ = 71607093360.

The previous prime is 72800544967. The next prime is 72800544979. The reversal of 72800544977 is 77944500827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77944500827 = 53 ⋅1470650959.

It can be written as a sum of positive squares in 2 ways, for example, as 5038728256 + 67761816721 = 70984^2 + 260311^2 .

It is a cyclic number.

It is not a de Polignac number, because 72800544977 - 2¹² = 72800540881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72800544979) 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, 596725718 + ... + 596725839.

It is an arithmetic number, because the mean of its divisors is an integer number (18498499149).

Almost surely, 2^72800544977 is an apocalyptic number.

It is an amenable number.

72800544977 is a deficient number, since it is larger than the sum of its proper divisors (1193451619).

72800544977 is a wasteful number, since it uses less digits than its factorization.

72800544977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193451618.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 72800544977 in words is "seventy-two billion, eight hundred million, five hundred forty-four thousand, nine hundred seventy-seven".