405326331630651 has 4 divisors (see below), whose sum is σ = 540435108840872. Its totient is φ = 270217554420432.

The previous prime is 405326331630631. The next prime is 405326331630911. The reversal of 405326331630651 is 156036133623504.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 405326331630651 - 2¹⁸ = 405326331368507 is a prime.

It is a super-2 number, since 2×405326331630651² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405326331630651.

It is not an unprimeable number, because it can be changed into a prime (405326331630611) 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, 67554388605106 + ... + 67554388605111.

It is an arithmetic number, because the mean of its divisors is an integer number (135108777210218).

Almost surely, 2^{405326331630651} is an apocalyptic number.

405326331630651 is a deficient number, since it is larger than the sum of its proper divisors (135108777210221).

405326331630651 is a wasteful number, since it uses less digits than its factorization.

405326331630651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135108777210220.

The product of its (nonzero) digits is 3499200, while the sum is 48.

The spelling of 405326331630651 in words is "four hundred five trillion, three hundred twenty-six billion, three hundred thirty-one million, six hundred thirty thousand, six hundred fifty-one".