7681081351 has 4 divisors (see below), whose sum is σ = 7723992600. Its totient is φ = 7638170104.

The previous prime is 7681081337. The next prime is 7681081381. The reversal of 7681081351 is 1531801867.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7681081351 - 2²⁵ = 7647526919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681081301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21455356 + ... + 21455713.

It is an arithmetic number, because the mean of its divisors is an integer number (1930998150).

Almost surely, 2^7681081351 is an apocalyptic number.

7681081351 is a deficient number, since it is larger than the sum of its proper divisors (42911249).

7681081351 is a wasteful number, since it uses less digits than its factorization.

7681081351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42911248.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 7681081351 is about 87641.7785704968. The cubic root of 7681081351 is about 1973.0622537608.

The spelling of 7681081351 in words is "seven billion, six hundred eighty-one million, eighty-one thousand, three hundred fifty-one".