7681996791 has 24 divisors (see below), whose sum is σ = 12686828544. Its totient is φ = 4387830480.

The previous prime is 7681996781. The next prime is 7681996793. The reversal of 7681996791 is 1976991867.

It is not a de Polignac number, because 7681996791 - 2⁹ = 7681996279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681996793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129246 + ... + 179076.

It is an arithmetic number, because the mean of its divisors is an integer number (528617856).

Almost surely, 2^7681996791 is an apocalyptic number.

7681996791 is a deficient number, since it is larger than the sum of its proper divisors (5004831753).

7681996791 is a wasteful number, since it uses less digits than its factorization.

7681996791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52291 (or 52288 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 63.

The square root of 7681996791 is about 87647.0010382557. The cubic root of 7681996791 is about 1973.1406345806.

The spelling of 7681996791 in words is "seven billion, six hundred eighty-one million, nine hundred ninety-six thousand, seven hundred ninety-one".