49821756391 has 8 divisors (see below), whose sum is σ = 55272211200. Its totient is φ = 44524835640.

The previous prime is 49821756389. The next prime is 49821756407. The reversal of 49821756391 is 19365712894.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49821756391 - 2¹ = 49821756389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49821756331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38382831 + ... + 38384128.

It is an arithmetic number, because the mean of its divisors is an integer number (6909026400).

Almost surely, 2^49821756391 is an apocalyptic number.

49821756391 is a deficient number, since it is larger than the sum of its proper divisors (5450454809).

49821756391 is a wasteful number, since it uses less digits than its factorization.

49821756391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76767029.

The product of its digits is 3265920, while the sum is 55.

The spelling of 49821756391 in words is "forty-nine billion, eight hundred twenty-one million, seven hundred fifty-six thousand, three hundred ninety-one".