408044998655 has 32 divisors (see below), whose sum is σ = 578959280640. Its totient is φ = 270126864000.

The previous prime is 408044998619. The next prime is 408044998661. The reversal of 408044998655 is 556899440804.

It is a Cunningham number, because it is equal to 638784²-1.

It is not a de Polignac number, because 408044998655 - 2¹⁶ = 408044933119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18513752 + ... + 18535778.

It is an arithmetic number, because the mean of its divisors is an integer number (18092477520).

Almost surely, 2^408044998655 is an apocalyptic number.

408044998655 is a deficient number, since it is larger than the sum of its proper divisors (170914281985).

408044998655 is a wasteful number, since it uses less digits than its factorization.

408044998655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40319.

The product of its (nonzero) digits is 49766400, while the sum is 62.

The spelling of 408044998655 in words is "four hundred eight billion, forty-four million, nine hundred ninety-eight thousand, six hundred fifty-five".