7681435861 has 12 divisors (see below), whose sum is σ = 8478590400. Its totient is φ = 6953879240.

The previous prime is 7681435859. The next prime is 7681435891. The reversal of 7681435861 is 1685341867.

It is a happy number.

It is not a de Polignac number, because 7681435861 - 2¹ = 7681435859 is a prime.

It is a super-2 number, since 2×7681435861² (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 (7681435891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103891 + ... + 161728.

It is an arithmetic number, because the mean of its divisors is an integer number (706549200).

Almost surely, 2^7681435861 is an apocalyptic number.

It is an amenable number.

7681435861 is a deficient number, since it is larger than the sum of its proper divisors (797154539).

7681435861 is a wasteful number, since it uses less digits than its factorization.

7681435861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265880 (or 265869 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 7681435861 is about 87643.8010414884. The cubic root of 7681435861 is about 1973.0926079739.

The spelling of 7681435861 in words is "seven billion, six hundred eighty-one million, four hundred thirty-five thousand, eight hundred sixty-one".