49789187787 has 18 divisors (see below), whose sum is σ = 67852850044. Its totient is φ = 32474710160.

The previous prime is 49789187719. The next prime is 49789187797. The reversal of 49789187787 is 78778198794.

It is not a de Polignac number, because 49789187787 - 2¹¹ = 49789185739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49789187797) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18163237 + ... + 18165977.

Almost surely, 2^49789187787 is an apocalyptic number.

49789187787 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

49789187787 is a deficient number, since it is larger than the sum of its proper divisors (18063662257).

49789187787 is an frugal number, since it uses more digits than its factorization.

49789187787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5579 (or 2791 counting only the distinct ones).

The product of its digits is 398297088, while the sum is 75.

Multiplying 49789187787 by its sum of digits (75), we get a square (3734189084025 = 1932405²).

The spelling of 49789187787 in words is "forty-nine billion, seven hundred eighty-nine million, one hundred eighty-seven thousand, seven hundred eighty-seven".