49391136791 has 2 divisors, whose sum is σ = 49391136792. Its totient is φ = 49391136790.

The previous prime is 49391136701. The next prime is 49391136833. The reversal of 49391136791 is 19763119394.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49391136791 - 2¹⁰ = 49391135767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49391136701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24695568395 + 24695568396.

It is an arithmetic number, because the mean of its divisors is an integer number (24695568396).

Almost surely, 2^49391136791 is an apocalyptic number.

49391136791 is a deficient number, since it is larger than the sum of its proper divisors (1).

49391136791 is an equidigital number, since it uses as much as digits as its factorization.

49391136791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 53.

The spelling of 49391136791 in words is "forty-nine billion, three hundred ninety-one million, one hundred thirty-six thousand, seven hundred ninety-one".