7640831613 has 8 divisors (see below), whose sum is σ = 10207792800. Its totient is φ = 5083879088.

The previous prime is 7640831599. The next prime is 7640831623. The reversal of 7640831613 is 3161380467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7640831613 - 2⁵ = 7640831581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640831623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2500383 + ... + 2503436.

It is an arithmetic number, because the mean of its divisors is an integer number (1275974100).

Almost surely, 2^7640831613 is an apocalyptic number.

It is an amenable number.

7640831613 is a deficient number, since it is larger than the sum of its proper divisors (2566961187).

7640831613 is a wasteful number, since it uses less digits than its factorization.

7640831613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004331.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 7640831613 is about 87411.8505295478. The cubic root of 7640831613 is about 1969.6098596976.

The spelling of 7640831613 in words is "seven billion, six hundred forty million, eight hundred thirty-one thousand, six hundred thirteen".