2547855280621 has 4 divisors (see below), whose sum is σ = 2911834606432. Its totient is φ = 2183875954812.

The previous prime is 2547855280501. The next prime is 2547855280657. The reversal of 2547855280621 is 1260825587452.

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 2547855280621 - 2⁹ = 2547855280109 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 (2547855200621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181989662895 + ... + 181989662908.

It is an arithmetic number, because the mean of its divisors is an integer number (727958651608).

Almost surely, 2^{2547855280621} is an apocalyptic number.

It is an amenable number.

2547855280621 is a deficient number, since it is larger than the sum of its proper divisors (363979325811).

2547855280621 is an equidigital number, since it uses as much as digits as its factorization.

2547855280621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363979325810.

The product of its (nonzero) digits is 10752000, while the sum is 55.

The spelling of 2547855280621 in words is "two trillion, five hundred forty-seven billion, eight hundred fifty-five million, two hundred eighty thousand, six hundred twenty-one".