49931421856 has 24 divisors (see below), whose sum is σ = 100959313140. Its totient is φ = 24290961408.

The previous prime is 49931421853. The next prime is 49931421857. The reversal of 49931421856 is 65812413994.

It can be written as a sum of positive squares in 2 ways, for example, as 48796810000 + 1134611856 = 220900^2 + 33684^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (49931421853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21084721 + ... + 21087088.

Almost surely, 2^49931421856 is an apocalyptic number.

It is an amenable number.

49931421856 is an abundant number, since it is smaller than the sum of its proper divisors (51027891284).

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

49931421856 is a wasteful number, since it uses less digits than its factorization.

49931421856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42171856 (or 42171848 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The spelling of 49931421856 in words is "forty-nine billion, nine hundred thirty-one million, four hundred twenty-one thousand, eight hundred fifty-six".