402382857861 has 6 divisors (see below), whose sum is σ = 581219683590. Its totient is φ = 268255238568.

The previous prime is 402382857853. The next prime is 402382857881. The reversal of 402382857861 is 168758283204.

402382857861 is a `hidden beast` number, since 4 + 0 + 2 + 3 + 8 + 2 + 8 + 578 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 398879401761 + 3503456100 = 631569^2 + 59190^2 .

It is not a de Polignac number, because 402382857861 - 2³ = 402382857853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402382857798 and 402382857807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402382857881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22354603206 + ... + 22354603223.

It is an arithmetic number, because the mean of its divisors is an integer number (96869947265).

Almost surely, 2^402382857861 is an apocalyptic number.

It is an amenable number.

402382857861 is a deficient number, since it is larger than the sum of its proper divisors (178836825729).

402382857861 is a wasteful number, since it uses less digits than its factorization.

402382857861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44709206435 (or 44709206432 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 402382857861 in words is "four hundred two billion, three hundred eighty-two million, eight hundred fifty-seven thousand, eight hundred sixty-one".