42849693856 has 48 divisors (see below), whose sum is σ = 85176126504. Its totient is φ = 21218402304.

The previous prime is 42849693851. The next prime is 42849693869. The reversal of 42849693856 is 65839694824.

It can be written as a sum of positive squares in 4 ways, for example, as 18855683856 + 23994010000 = 137316^2 + 154900^2 .

It is not an unprimeable number, because it can be changed into a prime (42849693851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1886986 + ... + 1909558.

Almost surely, 2^42849693856 is an apocalyptic number.

It is an amenable number.

42849693856 is a deficient number, since it is larger than the sum of its proper divisors (42326432648).

42849693856 is a wasteful number, since it uses less digits than its factorization.

42849693856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23153 (or 23145 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 64.

The spelling of 42849693856 in words is "forty-two billion, eight hundred forty-nine million, six hundred ninety-three thousand, eight hundred fifty-six".