7640831611 has 16 divisors (see below), whose sum is σ = 9434750400. Its totient is φ = 6164027520.

The previous prime is 7640831599. The next prime is 7640831623. The reversal of 7640831611 is 1161380467.

It is an interprime number because it is at equal distance from previous prime (7640831599) and next prime (7640831623).

It is a de Polignac number, because none of the positive numbers 2^k-7640831611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7640831641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649360 + ... + 661021.

It is an arithmetic number, because the mean of its divisors is an integer number (589671900).

Almost surely, 2^7640831611 is an apocalyptic number.

7640831611 is a deficient number, since it is larger than the sum of its proper divisors (1793918789).

7640831611 is a wasteful number, since it uses less digits than its factorization.

7640831611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310419 (or 1310405 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 7640831611 is about 87411.8505181077. The cubic root of 7640831611 is about 1969.6098595258.

The spelling of 7640831611 in words is "seven billion, six hundred forty million, eight hundred thirty-one thousand, six hundred eleven".