408805506545 has 8 divisors (see below), whose sum is σ = 507482697960. Its totient is φ = 315767011840.

The previous prime is 408805506541. The next prime is 408805506583. The reversal of 408805506545 is 545605508804.

It can be written as a sum of positive squares in 4 ways, for example, as 728568064 + 408076938481 = 26992^2 + 638809^2 .

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

It is not a de Polignac number, because 408805506545 - 2² = 408805506541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 408805506493 and 408805506502.

It is not an unprimeable number, because it can be changed into a prime (408805506541) 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, 1409674016 + ... + 1409674305.

It is an arithmetic number, because the mean of its divisors is an integer number (63435337245).

Almost surely, 2^408805506545 is an apocalyptic number.

It is an amenable number.

408805506545 is a deficient number, since it is larger than the sum of its proper divisors (98677191415).

408805506545 is a wasteful number, since it uses less digits than its factorization.

408805506545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819348355.

The product of its (nonzero) digits is 3840000, while the sum is 50.

The spelling of 408805506545 in words is "four hundred eight billion, eight hundred five million, five hundred six thousand, five hundred forty-five".