7081691904 has 432 divisors, whose sum is σ = 25805025792. Its totient is φ = 1819901952.

The previous prime is 7081691899. The next prime is 7081691909. The reversal of 7081691904 is 4091961807.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7081691899) and next prime (7081691909).

It is a self number, because there is not a number n which added to its sum of digits gives 7081691904.

It is not an unprimeable number, because it can be changed into a prime (7081691909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6305487 + ... + 6306609.

It is an arithmetic number, because the mean of its divisors is an integer number (59733856).

Almost surely, 2^7081691904 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 7081691904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12902512896).

7081691904 is an abundant number, since it is smaller than the sum of its proper divisors (18723333888).

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

7081691904 is a wasteful number, since it uses less digits than its factorization.

7081691904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 7081691904 is about 84152.7890446894. The cubic root of 7081691904 is about 1920.3438967333.

The spelling of 7081691904 in words is "seven billion, eighty-one million, six hundred ninety-one thousand, nine hundred four".