2541865845851 has 2 divisors, whose sum is σ = 2541865845852. Its totient is φ = 2541865845850.

The previous prime is 2541865845823. The next prime is 2541865845973. The reversal of 2541865845851 is 1585485681452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2541865845851 - 2³⁸ = 2266987938907 is a prime.

It is a super-2 number, since 2×2541865845851² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2541865845821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270932922925 + 1270932922926.

It is an arithmetic number, because the mean of its divisors is an integer number (1270932922926).

Almost surely, 2^{2541865845851} is an apocalyptic number.

2541865845851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2541865845851 is an equidigital number, since it uses as much as digits as its factorization.

2541865845851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440000, while the sum is 62.

The spelling of 2541865845851 in words is "two trillion, five hundred forty-one billion, eight hundred sixty-five million, eight hundred forty-five thousand, eight hundred fifty-one".