49787921785 has 16 divisors (see below), whose sum is σ = 69242280192. Its totient is φ = 33659438400.

The previous prime is 49787921741. The next prime is 49787921789. The reversal of 49787921785 is 58712978794.

It is a de Polignac number, because none of the positive numbers 2^k-49787921785 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49787921785.

It is not an unprimeable number, because it can be changed into a prime (49787921789) 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, 10015206 + ... + 10020175.

It is an arithmetic number, because the mean of its divisors is an integer number (4327642512).

Almost surely, 2^49787921785 is an apocalyptic number.

It is an amenable number.

49787921785 is a deficient number, since it is larger than the sum of its proper divisors (19454358407).

49787921785 is a wasteful number, since it uses less digits than its factorization.

49787921785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20035464.

The product of its digits is 71124480, while the sum is 67.

The spelling of 49787921785 in words is "forty-nine billion, seven hundred eighty-seven million, nine hundred twenty-one thousand, seven hundred eighty-five".