7616391985 has 32 divisors (see below), whose sum is σ = 9605135232. Its totient is φ = 5792532480.

The previous prime is 7616391961. The next prime is 7616391989. The reversal of 7616391985 is 5891936167.

It is a happy number.

It is not a de Polignac number, because 7616391985 - 2²⁷ = 7482174257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7616391989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1269162 + ... + 1275148.

It is an arithmetic number, because the mean of its divisors is an integer number (300160476).

Almost surely, 2^7616391985 is an apocalyptic number.

It is an amenable number.

7616391985 is a deficient number, since it is larger than the sum of its proper divisors (1988743247).

7616391985 is a wasteful number, since it uses less digits than its factorization.

7616391985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193.

The product of its digits is 2449440, while the sum is 55.

The square root of 7616391985 is about 87271.9427135663. The cubic root of 7616391985 is about 1967.5076475923.

The spelling of 7616391985 in words is "seven billion, six hundred sixteen million, three hundred ninety-one thousand, nine hundred eighty-five".