613672641 has 6 divisors (see below), whose sum is σ = 886416050. Its totient is φ = 409115088.

The previous prime is 613672601. The next prime is 613672663. The reversal of 613672641 is 146276316.

It is a happy number.

613672641 is a `hidden beast` number, since 6 + 1 + 3 + 6 + 7 + 2 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 466560000 + 147112641 = 21600^2 + 12129^2 .

It is a de Polignac number, because none of the positive numbers 2^k-613672641 is a prime.

It is a super-2 number, since 2×613672641² = 753188220623829762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 613672596 and 613672605.

It is not an unprimeable number, because it can be changed into a prime (613672601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34092916 + ... + 34092933.

Almost surely, 2^613672641 is an apocalyptic number.

It is an amenable number.

613672641 is a deficient number, since it is larger than the sum of its proper divisors (272743409).

613672641 is a wasteful number, since it uses less digits than its factorization.

613672641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68185855 (or 68185852 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 613672641 is about 24772.4169390070. The cubic root of 613672641 is about 849.7912479293.

The spelling of 613672641 in words is "six hundred thirteen million, six hundred seventy-two thousand, six hundred forty-one".