571077320656 has 80 divisors (see below), whose sum is σ = 1183681382400. Its totient is φ = 265973442560.

The previous prime is 571077320641. The next prime is 571077320713. The reversal of 571077320656 is 656023770175.

It is a super-2 number, since 2×571077320656² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10206645 + ... + 10262443.

It is an arithmetic number, because the mean of its divisors is an integer number (14796017280).

Almost surely, 2^571077320656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 571077320656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591840691200).

571077320656 is an abundant number, since it is smaller than the sum of its proper divisors (612604061744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

571077320656 is a wasteful number, since it uses less digits than its factorization.

571077320656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56212 (or 56206 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 571077320656 in words is "five hundred seventy-one billion, seventy-seven million, three hundred twenty thousand, six hundred fifty-six".