408065016690 has 48 divisors (see below), whose sum is σ = 1071473711256. Its totient is φ = 107739936000.

The previous prime is 408065016683. The next prime is 408065016701. The reversal of 408065016690 is 96610560804.

408065016690 is a `hidden beast` number, since 4 + 0 + 80 + 6 + 501 + 6 + 69 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 393960841569 + 14104175121 = 627663^2 + 118761^2 .

It is a super-2 number, since 2×408065016690² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22436731 + ... + 22454910.

Almost surely, 2^408065016690 is an apocalyptic number.

408065016690 is an abundant number, since it is smaller than the sum of its proper divisors (663408694566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

408065016690 is a wasteful number, since it uses less digits than its factorization.

408065016690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44891755 (or 44891752 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 408065016690 in words is "four hundred eight billion, sixty-five million, sixteen thousand, six hundred ninety".