49561723787 has 4 divisors (see below), whose sum is σ = 49614393936. Its totient is φ = 49509053640.

The previous prime is 49561723751. The next prime is 49561723793. The reversal of 49561723787 is 78732716594.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49561723787 - 2⁶ = 49561723723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49561723747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26333663 + ... + 26335544.

It is an arithmetic number, because the mean of its divisors is an integer number (12403598484).

Almost surely, 2^49561723787 is an apocalyptic number.

49561723787 is a deficient number, since it is larger than the sum of its proper divisors (52670149).

49561723787 is an equidigital number, since it uses as much as digits as its factorization.

49561723787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52670148.

The product of its digits is 17781120, while the sum is 59.

The spelling of 49561723787 in words is "forty-nine billion, five hundred sixty-one million, seven hundred twenty-three thousand, seven hundred eighty-seven".