2554120781 has 2 divisors, whose sum is σ = 2554120782. Its totient is φ = 2554120780.

The previous prime is 2554120763. The next prime is 2554120801. The reversal of 2554120781 is 1870214552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1375297225 + 1178823556 = 37085^2 + 34334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2554120781 - 2³⁰ = 1480378957 is a prime.

It is a super-3 number, since 3×2554120781³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2554120981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277060390 + 1277060391.

It is an arithmetic number, because the mean of its divisors is an integer number (1277060391).

Almost surely, 2^2554120781 is an apocalyptic number.

It is an amenable number.

2554120781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2554120781 is an equidigital number, since it uses as much as digits as its factorization.

2554120781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 2554120781 is about 50538.3100330828. The cubic root of 2554120781 is about 1366.9327334911.

The spelling of 2554120781 in words is "two billion, five hundred fifty-four million, one hundred twenty thousand, seven hundred eighty-one".