7681451720 has 32 divisors (see below), whose sum is σ = 17298385920. Its totient is φ = 3069892800.

The previous prime is 7681451699. The next prime is 7681451741. The reversal of 7681451720 is 271541867.

It is an interprime number because it is at equal distance from previous prime (7681451699) and next prime (7681451741).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 37382 + ... + 129461.

It is an arithmetic number, because the mean of its divisors is an integer number (540574560).

Almost surely, 2^7681451720 is an apocalyptic number.

It is an amenable number.

7681451720 is an abundant number, since it is smaller than the sum of its proper divisors (9616934200).

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

7681451720 is a wasteful number, since it uses less digits than its factorization.

7681451720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168005 (or 168001 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 7681451720 is about 87643.8915156099. The cubic root of 7681451720 is about 1973.0939658473.

The spelling of 7681451720 in words is "seven billion, six hundred eighty-one million, four hundred fifty-one thousand, seven hundred twenty".