2748456383821 has 4 divisors (see below), whose sum is σ = 2748712708672. Its totient is φ = 2748200058972.

The previous prime is 2748456383767. The next prime is 2748456383977. The reversal of 2748456383821 is 1283836548472.

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 2748456383821 - 2⁷ = 2748456383693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2748456383821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2748456183821) 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, 128146341 + ... + 128167786.

It is an arithmetic number, because the mean of its divisors is an integer number (687178177168).

Almost surely, 2^{2748456383821} is an apocalyptic number.

It is an amenable number.

2748456383821 is a deficient number, since it is larger than the sum of its proper divisors (256324851).

2748456383821 is a wasteful number, since it uses less digits than its factorization.

2748456383821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256324850.

The product of its digits is 61931520, while the sum is 61.

The spelling of 2748456383821 in words is "two trillion, seven hundred forty-eight billion, four hundred fifty-six million, three hundred eighty-three thousand, eight hundred twenty-one".