49724286821 has 4 divisors (see below), whose sum is σ = 54244676544. Its totient is φ = 45203897100.

The previous prime is 49724286817. The next prime is 49724286847. The reversal of 49724286821 is 12868242794.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49724286821 - 2² = 49724286817 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 (49724286811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2260194845 + ... + 2260194866.

It is an arithmetic number, because the mean of its divisors is an integer number (13561169136).

Almost surely, 2^49724286821 is an apocalyptic number.

It is an amenable number.

49724286821 is a deficient number, since it is larger than the sum of its proper divisors (4520389723).

49724286821 is a wasteful number, since it uses less digits than its factorization.

49724286821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520389722.

The product of its digits is 3096576, while the sum is 53.

The spelling of 49724286821 in words is "forty-nine billion, seven hundred twenty-four million, two hundred eighty-six thousand, eight hundred twenty-one".