613249944 has 16 divisors (see below), whose sum is σ = 1533124920. Its totient is φ = 204416640.

The previous prime is 613249939. The next prime is 613249957. The reversal of 613249944 is 449942316.

It is a junction number, because it is equal to n+sod(n) for n = 613249896 and 613249905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12776017 + ... + 12776064.

Almost surely, 2^613249944 is an apocalyptic number.

It is an amenable number.

613249944 is an abundant number, since it is smaller than the sum of its proper divisors (919874976).

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

613249944 is a wasteful number, since it uses less digits than its factorization.

613249944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25552090 (or 25552086 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 613249944 is about 24763.8838634007. The cubic root of 613249944 is about 849.5960913741.

Subtracting from 613249944 its reverse (449942316), we obtain a triangular number (163307628 = T₁₈₀₇₂).

The spelling of 613249944 in words is "six hundred thirteen million, two hundred forty-nine thousand, nine hundred forty-four".