49398720643 has 4 divisors (see below), whose sum is σ = 49406887728. Its totient is φ = 49390553560.

The previous prime is 49398720629. The next prime is 49398720661. The reversal of 49398720643 is 34602789394.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34602789394 = 2 ⋅17301394697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49398720643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49398720743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4074463 + ... + 4086568.

It is an arithmetic number, because the mean of its divisors is an integer number (12351721932).

Almost surely, 2^49398720643 is an apocalyptic number.

49398720643 is a deficient number, since it is larger than the sum of its proper divisors (8167085).

49398720643 is an equidigital number, since it uses as much as digits as its factorization.

49398720643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167084.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 49398720643 in words is "forty-nine billion, three hundred ninety-eight million, seven hundred twenty thousand, six hundred forty-three".