49661591845 has 16 divisors (see below), whose sum is σ = 61344074880. Its totient is φ = 38567392704.

The previous prime is 49661591843. The next prime is 49661591849. The reversal of 49661591845 is 54819516694.

It is a cyclic number.

It is not a de Polignac number, because 49661591845 - 2¹ = 49661591843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49661591845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49661591843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224527 + ... + 386956.

It is an arithmetic number, because the mean of its divisors is an integer number (3834004680).

Almost surely, 2^49661591845 is an apocalyptic number.

It is an amenable number.

49661591845 is a deficient number, since it is larger than the sum of its proper divisors (11682483035).

49661591845 is a wasteful number, since it uses less digits than its factorization.

49661591845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611964.

The product of its digits is 9331200, while the sum is 58.

The spelling of 49661591845 in words is "forty-nine billion, six hundred sixty-one million, five hundred ninety-one thousand, eight hundred forty-five".