402426221845 has 8 divisors (see below), whose sum is σ = 482915007576. Its totient is φ = 321938616576.

The previous prime is 402426221731. The next prime is 402426221881. The reversal of 402426221845 is 548122624204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 117353519761 + 285072702084 = 342569^2 + 533922^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402426221845 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402426221798 and 402426221807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880969 + ... + 1257361.

It is an arithmetic number, because the mean of its divisors is an integer number (60364375947).

Almost surely, 2^402426221845 is an apocalyptic number.

It is an amenable number.

402426221845 is a deficient number, since it is larger than the sum of its proper divisors (80488785731).

402426221845 is a wasteful number, since it uses less digits than its factorization.

402426221845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590231.

The product of its (nonzero) digits is 245760, while the sum is 40.

The spelling of 402426221845 in words is "four hundred two billion, four hundred twenty-six million, two hundred twenty-one thousand, eight hundred forty-five".