7691937891 has 16 divisors (see below), whose sum is σ = 11426323968. Its totient is φ = 4562592800.

The previous prime is 7691937871. The next prime is 7691937919. The reversal of 7691937891 is 1987391967.

7691937891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7691937891 - 2¹⁹ = 7691413603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7691937871) by changing a digit.

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, 2478120 + ... + 2481221.

It is an arithmetic number, because the mean of its divisors is an integer number (714145248).

Almost surely, 2^7691937891 is an apocalyptic number.

7691937891 is a deficient number, since it is larger than the sum of its proper divisors (3734386077).

7691937891 is a wasteful number, since it uses less digits than its factorization.

7691937891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4959402.

The product of its digits is 5143824, while the sum is 60.

The square root of 7691937891 is about 87703.6937135489. The cubic root of 7691937891 is about 1973.9914000687.

The spelling of 7691937891 in words is "seven billion, six hundred ninety-one million, nine hundred thirty-seven thousand, eight hundred ninety-one".