6991725490 has 64 divisors (see below), whose sum is σ = 13784359680. Its totient is φ = 2542786560.

The previous prime is 6991725463. The next prime is 6991725509. The reversal of 6991725490 is 945271996.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713041 + ... + 722779.

It is an arithmetic number, because the mean of its divisors is an integer number (215380620).

Almost surely, 2^6991725490 is an apocalyptic number.

6991725490 is a deficient number, since it is larger than the sum of its proper divisors (6792634190).

6991725490 is a wasteful number, since it uses less digits than its factorization.

6991725490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9907.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The square root of 6991725490 is about 83616.5383760892. The cubic root of 6991725490 is about 1912.1771442419.

The spelling of 6991725490 in words is "six billion, nine hundred ninety-one million, seven hundred twenty-five thousand, four hundred ninety".