7688121881 has 8 divisors (see below), whose sum is σ = 8390643744. Its totient is φ = 6986200320.

The previous prime is 7688121863. The next prime is 7688121899. The reversal of 7688121881 is 1881218867.

It is an interprime number because it is at equal distance from previous prime (7688121863) and next prime (7688121899).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7688121881 - 2¹⁸ = 7687859737 is a prime.

It is a super-2 number, since 2×7688121881² (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 (7688121281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123080 + ... + 174713.

It is an arithmetic number, because the mean of its divisors is an integer number (1048830468).

Almost surely, 2^7688121881 is an apocalyptic number.

It is an amenable number.

7688121881 is a deficient number, since it is larger than the sum of its proper divisors (702521863).

7688121881 is a wasteful number, since it uses less digits than its factorization.

7688121881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300151.

The product of its digits is 344064, while the sum is 50.

The square root of 7688121881 is about 87681.9358876160. The cubic root of 7688121881 is about 1973.6649103052.

The spelling of 7688121881 in words is "seven billion, six hundred eighty-eight million, one hundred twenty-one thousand, eight hundred eighty-one".