5618861894 has 4 divisors (see below), whose sum is σ = 8428292844. Its totient is φ = 2809430946.

The previous prime is 5618861863. The next prime is 5618861909. The reversal of 5618861894 is 4981688165.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404715472 + ... + 1404715475.

It is an arithmetic number, because the mean of its divisors is an integer number (2107073211).

Almost surely, 2^5618861894 is an apocalyptic number.

5618861894 is a deficient number, since it is larger than the sum of its proper divisors (2809430950).

5618861894 is a wasteful number, since it uses less digits than its factorization.

5618861894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809430949.

The product of its digits is 3317760, while the sum is 56.

The square root of 5618861894 is about 74959.0681238768. The cubic root of 5618861894 is about 1777.7995253020.

The spelling of 5618861894 in words is "five billion, six hundred eighteen million, eight hundred sixty-one thousand, eight hundred ninety-four".