49681998939 has 16 divisors (see below), whose sum is σ = 67342609440. Its totient is φ = 32571586560.

The previous prime is 49681998913. The next prime is 49681998941. The reversal of 49681998939 is 93989918694.

It is not a de Polignac number, because 49681998939 - 2⁸ = 49681998683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49681918939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 945979 + ... + 997115.

It is an arithmetic number, because the mean of its divisors is an integer number (4208913090).

Almost surely, 2^49681998939 is an apocalyptic number.

49681998939 is a deficient number, since it is larger than the sum of its proper divisors (17660610501).

49681998939 is a wasteful number, since it uses less digits than its factorization.

49681998939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56510.

The product of its digits is 272097792, while the sum is 75.

The spelling of 49681998939 in words is "forty-nine billion, six hundred eighty-one million, nine hundred ninety-eight thousand, nine hundred thirty-nine".