2555554781 has 16 divisors (see below), whose sum is σ = 2851150848. Its totient is φ = 2274652800.

The previous prime is 2555554751. The next prime is 2555554787. The reversal of 2555554781 is 1874555552.

It is a cyclic number.

It is not a de Polignac number, because 2555554781 - 2¹⁴ = 2555538397 is a prime.

It is a super-2 number, since 2×2555554781² = 13061720477383915922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555554787) 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 15 ways as a sum of consecutive naturals, for example, 101960 + ... + 124526.

It is an arithmetic number, because the mean of its divisors is an integer number (178196928).

Almost surely, 2^2555554781 is an apocalyptic number.

It is an amenable number.

2555554781 is a deficient number, since it is larger than the sum of its proper divisors (295596067).

2555554781 is a wasteful number, since it uses less digits than its factorization.

2555554781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22892.

The product of its digits is 1400000, while the sum is 47.

The square root of 2555554781 is about 50552.4952994410. The cubic root of 2555554781 is about 1367.1885051084.

The spelling of 2555554781 in words is "two billion, five hundred fifty-five million, five hundred fifty-four thousand, seven hundred eighty-one".