8402943861 has 16 divisors (see below), whose sum is σ = 13406406720. Its totient is φ = 5171042160.

The previous prime is 8402943827. The next prime is 8402943877. The reversal of 8402943861 is 1683492048.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-8402943861 is a prime.

It is a super-2 number, since 2×8402943861² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8402943761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11969655 + ... + 11970356.

It is an arithmetic number, because the mean of its divisors is an integer number (837900420).

Almost surely, 2^8402943861 is an apocalyptic number.

It is an amenable number.

8402943861 is a deficient number, since it is larger than the sum of its proper divisors (5003462859).

8402943861 is a wasteful number, since it uses less digits than its factorization.

8402943861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23940033 (or 23940027 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 8402943861 is about 91667.5725706752. The cubic root of 8402943861 is about 2033.0301564966.

The spelling of 8402943861 in words is "eight billion, four hundred two million, nine hundred forty-three thousand, eight hundred sixty-one".