577315956721 has 4 divisors (see below), whose sum is σ = 659789664832. Its totient is φ = 494842248612.

The previous prime is 577315956617. The next prime is 577315956761. The reversal of 577315956721 is 127659513775.

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 a cyclic number.

It is not a de Polignac number, because 577315956721 - 2⁹ = 577315956209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (577315956761) 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, 41236854045 + ... + 41236854058.

It is an arithmetic number, because the mean of its divisors is an integer number (164947416208).

Almost surely, 2^577315956721 is an apocalyptic number.

It is an amenable number.

577315956721 is a deficient number, since it is larger than the sum of its proper divisors (82473708111).

577315956721 is an equidigital number, since it uses as much as digits as its factorization.

577315956721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82473708110.

The product of its digits is 13891500, while the sum is 58.

The spelling of 577315956721 in words is "five hundred seventy-seven billion, three hundred fifteen million, nine hundred fifty-six thousand, seven hundred twenty-one".