49661558826 has 96 divisors (see below), whose sum is σ = 115996769280. Its totient is φ = 14123244960.

The previous prime is 49661558819. The next prime is 49661558831. The reversal of 49661558826 is 62885516694.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49661558826.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1459135 + ... + 1492781.

It is an arithmetic number, because the mean of its divisors is an integer number (1208299680).

Almost surely, 2^49661558826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49661558826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57998384640).

49661558826 is an abundant number, since it is smaller than the sum of its proper divisors (66335210454).

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

49661558826 is a wasteful number, since it uses less digits than its factorization.

49661558826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33800 (or 33789 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 60.

The spelling of 49661558826 in words is "forty-nine billion, six hundred sixty-one million, five hundred fifty-eight thousand, eight hundred twenty-six".