617491069636 has 135 divisors (see below), whose sum is σ = 1324232634417. Its totient is φ = 251206462080.

The previous prime is 617491069633. The next prime is 617491069669. The reversal of 617491069636 is 636960194716.

The square root of 617491069636 is 785806.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 111685629636 + 505805440000 = 334194^2 + 711200^2 .

It is a super-2 number, since 2×617491069636² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (617491069633) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 15060757776 + ... + 15060757816.

Almost surely, 2^617491069636 is an apocalyptic number.

617491069636 is the 785806-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 617491069636

617491069636 is an abundant number, since it is smaller than the sum of its proper divisors (706741564781).

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

617491069636 is an frugal number, since it uses more digits than its factorization.

617491069636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 617491069636 in words is "six hundred seventeen billion, four hundred ninety-one million, sixty-nine thousand, six hundred thirty-six".