616981911 has 64 divisors (see below), whose sum is σ = 1041503232. Its totient is φ = 316265472.

The previous prime is 616981879. The next prime is 616981943. The reversal of 616981911 is 119189616.

It is a happy number.

616981911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (616981879) and next prime (616981943).

It is not a de Polignac number, because 616981911 - 2⁵ = 616981879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616981951) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1653921 + ... + 1654293.

It is an arithmetic number, because the mean of its divisors is an integer number (16273488).

Almost surely, 2^616981911 is an apocalyptic number.

616981911 is a deficient number, since it is larger than the sum of its proper divisors (424521321).

616981911 is a wasteful number, since it uses less digits than its factorization.

616981911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its digits is 23328, while the sum is 42.

The square root of 616981911 is about 24839.1205762201. The cubic root of 616981911 is about 851.3160287405.

The spelling of 616981911 in words is "six hundred sixteen million, nine hundred eighty-one thousand, nine hundred eleven".