402665113255321 has 4 divisors (see below), whose sum is σ = 460188700863232. Its totient is φ = 345141525647412.

The previous prime is 402665113255313. The next prime is 402665113255337. The reversal of 402665113255321 is 123552311566204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402665113255321 - 2³ = 402665113255313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402665113255421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28761793803945 + ... + 28761793803958.

It is an arithmetic number, because the mean of its divisors is an integer number (115047175215808).

Almost surely, 2^{402665113255321} is an apocalyptic number.

It is an amenable number.

402665113255321 is a deficient number, since it is larger than the sum of its proper divisors (57523587607911).

402665113255321 is an equidigital number, since it uses as much as digits as its factorization.

402665113255321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57523587607910.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 402665113255321 in words is "four hundred two trillion, six hundred sixty-five billion, one hundred thirteen million, two hundred fifty-five thousand, three hundred twenty-one".