405312339051985 has 8 divisors (see below), whose sum is σ = 490836961054440. Its totient is φ = 321275101780224.

The previous prime is 405312339051943. The next prime is 405312339051989. The reversal of 405312339051985 is 589150933213504.

It can be written as a sum of positive squares in 4 ways, for example, as 7236379762704 + 398075959289281 = 2690052^2 + 19951841^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 405312339051985 - 2⁴⁷ = 264574850696657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405312339051989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371846182072 + ... + 371846183161.

It is an arithmetic number, because the mean of its divisors is an integer number (61354620131805).

Almost surely, 2^{405312339051985} is an apocalyptic number.

It is an amenable number.

405312339051985 is a deficient number, since it is larger than the sum of its proper divisors (85524622002455).

405312339051985 is a wasteful number, since it uses less digits than its factorization.

405312339051985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743692365347.

The product of its (nonzero) digits is 17496000, while the sum is 58.

The spelling of 405312339051985 in words is "four hundred five trillion, three hundred twelve billion, three hundred thirty-nine million, fifty-one thousand, nine hundred eighty-five".