7493608681 has 4 divisors (see below), whose sum is σ = 8070040132. Its totient is φ = 6917177232.

The previous prime is 7493608669. The next prime is 7493608691. The reversal of 7493608681 is 1868063947.

It is a happy number.

7493608681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2059707456 + 5433901225 = 45384^2 + 73715^2 .

It is a cyclic number.

It is not a de Polignac number, because 7493608681 - 2⁵ = 7493608649 is a prime.

It is a super-2 number, since 2×7493608681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7493608621) 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, 288215706 + ... + 288215731.

It is an arithmetic number, because the mean of its divisors is an integer number (2017510033).

Almost surely, 2^7493608681 is an apocalyptic number.

It is an amenable number.

7493608681 is a deficient number, since it is larger than the sum of its proper divisors (576431451).

7493608681 is a wasteful number, since it uses less digits than its factorization.

7493608681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576431450.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 7493608681 is about 86565.6322162554. The cubic root of 7493608681 is about 1956.8776366115.

The spelling of 7493608681 in words is "seven billion, four hundred ninety-three million, six hundred eight thousand, six hundred eighty-one".