7655240681 has 4 divisors (see below), whose sum is σ = 8351171664. Its totient is φ = 6959309700.

The previous prime is 7655240669. The next prime is 7655240701. The reversal of 7655240681 is 1860425567.

7655240681 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7655240681 is a prime.

It is a super-2 number, since 2×7655240681² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7655260681) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 347965475 + ... + 347965496.

It is an arithmetic number, because the mean of its divisors is an integer number (2087792916).

Almost surely, 2^7655240681 is an apocalyptic number.

It is an amenable number.

7655240681 is a deficient number, since it is larger than the sum of its proper divisors (695930983).

7655240681 is a wasteful number, since it uses less digits than its factorization.

7655240681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695930982.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 7655240681 is about 87494.2322727618. The cubic root of 7655240681 is about 1970.8471779504.

The spelling of 7655240681 in words is "seven billion, six hundred fifty-five million, two hundred forty thousand, six hundred eighty-one".