408008226921 has 16 divisors (see below), whose sum is σ = 568485196800. Its totient is φ = 259802603280.

The previous prime is 408008226883. The next prime is 408008226973. The reversal of 408008226921 is 129622800804.

It is not a de Polignac number, because 408008226921 - 2¹¹ = 408008224873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408008226721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4231021 + ... + 4326378.

It is an arithmetic number, because the mean of its divisors is an integer number (35530324800).

Almost surely, 2^408008226921 is an apocalyptic number.

It is an amenable number.

408008226921 is a deficient number, since it is larger than the sum of its proper divisors (160476969879).

408008226921 is a wasteful number, since it uses less digits than its factorization.

408008226921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8558116.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 408008226921 in words is "four hundred eight billion, eight million, two hundred twenty-six thousand, nine hundred twenty-one".