613963910863 has 4 divisors (see below), whose sum is σ = 640657993968. Its totient is φ = 587269827760.

The previous prime is 613963910837. The next prime is 613963910927. The reversal of 613963910863 is 368019369316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613963910863 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 (613963910803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13347041518 + ... + 13347041563.

It is an arithmetic number, because the mean of its divisors is an integer number (160164498492).

Almost surely, 2^613963910863 is an apocalyptic number.

613963910863 is a deficient number, since it is larger than the sum of its proper divisors (26694083105).

613963910863 is a wasteful number, since it uses less digits than its factorization.

613963910863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26694083104.

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 613963910863 in words is "six hundred thirteen billion, nine hundred sixty-three million, nine hundred ten thousand, eight hundred sixty-three".