408814437693997 has 4 divisors (see below), whose sum is σ = 408814587566460. Its totient is φ = 408814287821536.

The previous prime is 408814437693919. The next prime is 408814437694021. The reversal of 408814437693997 is 799396734418804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 402990609039876 + 5823828654121 = 20074626^2 + 2413261^2 .

It is a cyclic number.

It is not a de Polignac number, because 408814437693997 - 2⁷ = 408814437693869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 408814437693997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408814437693397) 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, 70767298 + ... + 76325875.

It is an arithmetic number, because the mean of its divisors is an integer number (102203646891615).

Almost surely, 2^{408814437693997} is an apocalyptic number.

It is an amenable number.

408814437693997 is a deficient number, since it is larger than the sum of its proper divisors (149872463).

408814437693997 is a wasteful number, since it uses less digits than its factorization.

408814437693997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149872462.

The product of its (nonzero) digits is 7900913664, while the sum is 82.

The spelling of 408814437693997 in words is "four hundred eight trillion, eight hundred fourteen billion, four hundred thirty-seven million, six hundred ninety-three thousand, nine hundred ninety-seven".