405947849085 has 12 divisors (see below), whose sum is σ = 703642938492. Its totient is φ = 216505519488.

The previous prime is 405947849077. The next prime is 405947849101. The reversal of 405947849085 is 580948749504.

405947849085 is a `hidden beast` number, since 40 + 5 + 9 + 478 + 49 + 0 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 272152109124 + 133795739961 = 521682^2 + 365781^2 .

It is not a de Polignac number, because 405947849085 - 2³ = 405947849077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4510531612 + ... + 4510531701.

It is an arithmetic number, because the mean of its divisors is an integer number (58636911541).

Almost surely, 2^405947849085 is an apocalyptic number.

405947849085 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

405947849085 is a deficient number, since it is larger than the sum of its proper divisors (297695089407).

405947849085 is a wasteful number, since it uses less digits than its factorization.

405947849085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9021063324 (or 9021063321 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 405947849085 in words is "four hundred five billion, nine hundred forty-seven million, eight hundred forty-nine thousand, eighty-five".