402826660865 has 24 divisors (see below), whose sum is σ = 504338313024. Its totient is φ = 308837599200.

The previous prime is 402826660849. The next prime is 402826660909. The reversal of 402826660865 is 568066628204.

It is not a de Polignac number, because 402826660865 - 2⁴ = 402826660849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87950 + ... + 901880.

It is an arithmetic number, because the mean of its divisors is an integer number (21014096376).

Almost surely, 2^402826660865 is an apocalyptic number.

It is an amenable number.

402826660865 is a deficient number, since it is larger than the sum of its proper divisors (101511652159).

402826660865 is a wasteful number, since it uses less digits than its factorization.

402826660865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814101 (or 814070 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 53.

The spelling of 402826660865 in words is "four hundred two billion, eight hundred twenty-six million, six hundred sixty thousand, eight hundred sixty-five".