613976845 has 24 divisors (see below), whose sum is σ = 799789032. Its totient is φ = 450908160.

The previous prime is 613976843. The next prime is 613976911. The reversal of 613976845 is 548679316.

It can be written as a sum of positive squares in 12 ways, for example, as 353928969 + 260047876 = 18813^2 + 16126^2 .

It is not a de Polignac number, because 613976845 - 2¹ = 613976843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613976843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140737 + ... + 145033.

It is an arithmetic number, because the mean of its divisors is an integer number (33324543).

Almost surely, 2^613976845 is an apocalyptic number.

It is an amenable number.

613976845 is a deficient number, since it is larger than the sum of its proper divisors (185812187).

613976845 is a wasteful number, since it uses less digits than its factorization.

613976845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401 (or 4360 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 613976845 is about 24778.5561524476. The cubic root of 613976845 is about 849.9316415615.

The spelling of 613976845 in words is "six hundred thirteen million, nine hundred seventy-six thousand, eight hundred forty-five".