405198207656 has 16 divisors (see below), whose sum is σ = 828814515840. Its totient is φ = 184181003440.

The previous prime is 405198207619. The next prime is 405198207769. The reversal of 405198207656 is 656702891504.

It is a junction number, because it is equal to n+sod(n) for n = 405198207598 and 405198207607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302262456 + ... + 2302262631.

It is an arithmetic number, because the mean of its divisors is an integer number (51800907240).

Almost surely, 2^405198207656 is an apocalyptic number.

It is an amenable number.

405198207656 is an abundant number, since it is smaller than the sum of its proper divisors (423616308184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405198207656 is a wasteful number, since it uses less digits than its factorization.

405198207656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604525104 (or 4604525100 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 405198207656 in words is "four hundred five billion, one hundred ninety-eight million, two hundred seven thousand, six hundred fifty-six".