613661864 has 32 divisors (see below), whose sum is σ = 1195776000. Its totient is φ = 294922560.

The previous prime is 613661863. The next prime is 613661879. The reversal of 613661864 is 468166316.

It is not an unprimeable number, because it can be changed into a prime (613661863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28649 + ... + 45255.

It is an arithmetic number, because the mean of its divisors is an integer number (37368000).

Almost surely, 2^613661864 is an apocalyptic number.

It is an amenable number.

613661864 is a deficient number, since it is larger than the sum of its proper divisors (582114136).

613661864 is a wasteful number, since it uses less digits than its factorization.

613661864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16793 (or 16789 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 613661864 is about 24772.1994178959. The cubic root of 613661864 is about 849.7862733694.

The spelling of 613661864 in words is "six hundred thirteen million, six hundred sixty-one thousand, eight hundred sixty-four".