906561056842 has 48 divisors (see below), whose sum is σ = 1637114348520. Its totient is φ = 374965718400.

The previous prime is 906561056839. The next prime is 906561056861. The reversal of 906561056842 is 248650165609.

It can be written as a sum of positive squares in 4 ways, for example, as 903014973441 + 3546083401 = 950271^2 + 59549^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 906561056842.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6584992 + ... + 6721252.

Almost surely, 2^906561056842 is an apocalyptic number.

906561056842 is a deficient number, since it is larger than the sum of its proper divisors (730553291678).

906561056842 is a wasteful number, since it uses less digits than its factorization.

906561056842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138647 (or 138640 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 906561056842 in words is "nine hundred six billion, five hundred sixty-one million, fifty-six thousand, eight hundred forty-two".