7681114781 has 4 divisors (see below), whose sum is σ = 8085384000. Its totient is φ = 7276845564.

The previous prime is 7681114769. The next prime is 7681114849. The reversal of 7681114781 is 1874111867.

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 not a de Polignac number, because 7681114781 - 2²² = 7676920477 is a prime.

It is a super-2 number, since 2×7681114781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681114751) 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, 202134581 + ... + 202134618.

It is an arithmetic number, because the mean of its divisors is an integer number (2021346000).

Almost surely, 2^7681114781 is an apocalyptic number.

It is an amenable number.

7681114781 is a deficient number, since it is larger than the sum of its proper divisors (404269219).

7681114781 is a wasteful number, since it uses less digits than its factorization.

7681114781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404269218.

The product of its digits is 75264, while the sum is 44.

The square root of 7681114781 is about 87641.9692898328. The cubic root of 7681114781 is about 1973.0651161779.

The spelling of 7681114781 in words is "seven billion, six hundred eighty-one million, one hundred fourteen thousand, seven hundred eighty-one".