616859918 has 4 divisors (see below), whose sum is σ = 925289880. Its totient is φ = 308429958.

The previous prime is 616859879. The next prime is 616859933. The reversal of 616859918 is 819958616.

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

It is a self number, because there is not a number n which added to its sum of digits gives 616859918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154214978 + ... + 154214981.

It is an arithmetic number, because the mean of its divisors is an integer number (231322470).

Almost surely, 2^616859918 is an apocalyptic number.

616859918 is a deficient number, since it is larger than the sum of its proper divisors (308429962).

616859918 is a wasteful number, since it uses less digits than its factorization.

616859918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308429961.

The product of its digits is 933120, while the sum is 53.

The square root of 616859918 is about 24836.6647921978. The cubic root of 616859918 is about 851.2599161057.

The spelling of 616859918 in words is "six hundred sixteen million, eight hundred fifty-nine thousand, nine hundred eighteen".