49391136815 has 4 divisors (see below), whose sum is σ = 59269364184. Its totient is φ = 39512909448.

The previous prime is 49391136791. The next prime is 49391136833. The reversal of 49391136815 is 51863119394.

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 49391136815 - 2⁸ = 49391136559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4939113677 + ... + 4939113686.

It is an arithmetic number, because the mean of its divisors is an integer number (14817341046).

Almost surely, 2^49391136815 is an apocalyptic number.

49391136815 is a deficient number, since it is larger than the sum of its proper divisors (9878227369).

49391136815 is an equidigital number, since it uses as much as digits as its factorization.

49391136815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9878227368.

The product of its digits is 699840, while the sum is 50.

The spelling of 49391136815 in words is "forty-nine billion, three hundred ninety-one million, one hundred thirty-six thousand, eight hundred fifteen".