408078622721 has 12 divisors (see below), whose sum is σ = 512627692416. Its totient is φ = 317983341720.

The previous prime is 408078622711. The next prime is 408078622727. The reversal of 408078622721 is 127226870804.

It is a happy number.

It is not a de Polignac number, because 408078622721 - 2³⁸ = 133200715777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408078622727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240895625 + ... + 240897318.

It is an arithmetic number, because the mean of its divisors is an integer number (42718974368).

Almost surely, 2^408078622721 is an apocalyptic number.

It is an amenable number.

408078622721 is a deficient number, since it is larger than the sum of its proper divisors (104549069695).

408078622721 is a wasteful number, since it uses less digits than its factorization.

408078622721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481792972 (or 481792961 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 408078622721 in words is "four hundred eight billion, seventy-eight million, six hundred twenty-two thousand, seven hundred twenty-one".