613565680 has 160 divisors (see below), whose sum is σ = 1767886848. Its totient is φ = 192844800.

The previous prime is 613565677. The next prime is 613565681. The reversal of 613565680 is 86565316.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613565681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1972725 + ... + 1973035.

Almost surely, 2^613565680 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 613565680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (883943424).

613565680 is an abundant number, since it is smaller than the sum of its proper divisors (1154321168).

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

613565680 is a wasteful number, since it uses less digits than its factorization.

613565680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 613565680 is about 24770.2579720115. The cubic root of 613565680 is about 849.7418731774.

The spelling of 613565680 in words is "six hundred thirteen million, five hundred sixty-five thousand, six hundred eighty".