7640831616 has 128 divisors (see below), whose sum is σ = 22203555840. Its totient is φ = 2308869120.

The previous prime is 7640831599. The next prime is 7640831623. The reversal of 7640831616 is 6161380467.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615431 + ... + 1620153.

It is an arithmetic number, because the mean of its divisors is an integer number (173465280).

Almost surely, 2^7640831616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7640831616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11101777920).

7640831616 is an abundant number, since it is smaller than the sum of its proper divisors (14562724224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7640831616 is a wasteful number, since it uses less digits than its factorization.

7640831616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 7640831616 is about 87411.8505467079. The cubic root of 7640831616 is about 1969.6098599554.

The spelling of 7640831616 in words is "seven billion, six hundred forty million, eight hundred thirty-one thousand, six hundred sixteen".