405112336621 has 4 divisors (see below), whose sum is σ = 418180476544. Its totient is φ = 392044196700.

The previous prime is 405112336591. The next prime is 405112336687. The reversal of 405112336621 is 126633211504.

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 405112336621 - 2⁵ = 405112336589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405112316621) 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, 6534069915 + ... + 6534069976.

It is an arithmetic number, because the mean of its divisors is an integer number (104545119136).

Almost surely, 2^405112336621 is an apocalyptic number.

It is an amenable number.

405112336621 is a deficient number, since it is larger than the sum of its proper divisors (13068139923).

405112336621 is a wasteful number, since it uses less digits than its factorization.

405112336621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13068139922.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 405112336621 in words is "four hundred five billion, one hundred twelve million, three hundred thirty-six thousand, six hundred twenty-one".