616615991983 has 2 divisors, whose sum is σ = 616615991984. Its totient is φ = 616615991982.

The previous prime is 616615991969. The next prime is 616615992023. The reversal of 616615991983 is 389199516616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616615991983 - 2³⁷ = 479177038511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616615991083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308307995991 + 308307995992.

It is an arithmetic number, because the mean of its divisors is an integer number (308307995992).

Almost surely, 2^616615991983 is an apocalyptic number.

616615991983 is a deficient number, since it is larger than the sum of its proper divisors (1).

616615991983 is an equidigital number, since it uses as much as digits as its factorization.

616615991983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18895680, while the sum is 64.

The spelling of 616615991983 in words is "six hundred sixteen billion, six hundred fifteen million, nine hundred ninety-one thousand, nine hundred eighty-three".