408278255625 has 80 divisors (see below), whose sum is σ = 757981118400. Its totient is φ = 217128384000.

The previous prime is 408278255621. The next prime is 408278255639. The reversal of 408278255625 is 526552872804.

408278255625 is a `hidden beast` number, since 4 + 0 + 8 + 2 + 7 + 8 + 2 + 5 + 5 + 625 = 666.

It is not a de Polignac number, because 408278255625 - 2² = 408278255621 is a prime.

It is a super-2 number, since 2×408278255625² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408278255621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5922606 + ... + 5991144.

It is an arithmetic number, because the mean of its divisors is an integer number (9474763980).

Almost surely, 2^408278255625 is an apocalyptic number.

408278255625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

408278255625 is a deficient number, since it is larger than the sum of its proper divisors (349702862775).

408278255625 is an equidigital number, since it uses as much as digits as its factorization.

408278255625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68921 (or 68900 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 54.

The spelling of 408278255625 in words is "four hundred eight billion, two hundred seventy-eight million, two hundred fifty-five thousand, six hundred twenty-five".