613660645320 has 64 divisors (see below), whose sum is σ = 1841212494720. Its totient is φ = 163622344704.

The previous prime is 613660645313. The next prime is 613660645327. The reversal of 613660645320 is 23546066316.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (613660645313) and next prime (613660645327).

It is a super-2 number, since 2×613660645320² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (613660645327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 654264 + ... + 1286616.

It is an arithmetic number, because the mean of its divisors is an integer number (28768945230).

Almost surely, 2^613660645320 is an apocalyptic number.

613660645320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

613660645320 is an abundant number, since it is smaller than the sum of its proper divisors (1227551849400).

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

613660645320 is a wasteful number, since it uses less digits than its factorization.

613660645320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640454 (or 640450 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 613660645320 in words is "six hundred thirteen billion, six hundred sixty million, six hundred forty-five thousand, three hundred twenty".