616616031 has 4 divisors (see below), whose sum is σ = 822154712. Its totient is φ = 411077352.

The previous prime is 616616023. The next prime is 616616041. The reversal of 616616031 is 130616616.

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

It is not a de Polignac number, because 616616031 - 2³ = 616616023 is a prime.

It is a super-2 number, since 2×616616031² = 760430659372385922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 616616031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616616041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102769336 + ... + 102769341.

It is an arithmetic number, because the mean of its divisors is an integer number (205538678).

Almost surely, 2^616616031 is an apocalyptic number.

616616031 is a deficient number, since it is larger than the sum of its proper divisors (205538681).

616616031 is a wasteful number, since it uses less digits than its factorization.

616616031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205538680.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 616616031 is about 24831.7544889603. The cubic root of 616616031 is about 851.1477141897.

The spelling of 616616031 in words is "six hundred sixteen million, six hundred sixteen thousand, thirty-one".