7681951720 has 32 divisors (see below), whose sum is σ = 17686357920. Its totient is φ = 3001320000.

The previous prime is 7681951679. The next prime is 7681951741. The reversal of 7681951720 is 271591867.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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, 2231406 + ... + 2234845.

It is an arithmetic number, because the mean of its divisors is an integer number (552698685).

Almost surely, 2^7681951720 is an apocalyptic number.

It is an amenable number.

7681951720 is an abundant number, since it is smaller than the sum of its proper divisors (10004406200).

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

7681951720 is a wasteful number, since it uses less digits than its factorization.

7681951720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466305 (or 4466301 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 46.

The square root of 7681951720 is about 87646.7439212661. The cubic root of 7681951720 is about 1973.1367757056.

The spelling of 7681951720 in words is "seven billion, six hundred eighty-one million, nine hundred fifty-one thousand, seven hundred twenty".