2546281978261 has 8 divisors (see below), whose sum is σ = 3003908693504. Its totient is φ = 2112123299760.

The previous prime is 2546281978187. The next prime is 2546281978307. The reversal of 2546281978261 is 1628791826452.

2546281978261 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 2546281978261 - 2¹¹ = 2546281976213 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 2546281978261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2546281978061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5867008950 + ... + 5867009383.

It is an arithmetic number, because the mean of its divisors is an integer number (375488586688).

Almost surely, 2^{2546281978261} is an apocalyptic number.

It is an amenable number.

2546281978261 is a deficient number, since it is larger than the sum of its proper divisors (457626715243).

2546281978261 is a wasteful number, since it uses less digits than its factorization.

2546281978261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11734018371.

The product of its digits is 23224320, while the sum is 61.

The spelling of 2546281978261 in words is "two trillion, five hundred forty-six billion, two hundred eighty-one million, nine hundred seventy-eight thousand, two hundred sixty-one".