1854374860817 has 2 divisors, whose sum is σ = 1854374860818. Its totient is φ = 1854374860816.

The previous prime is 1854374860799. The next prime is 1854374860841. The reversal of 1854374860817 is 7180684734581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1593694157056 + 260680703761 = 1262416^2 + 510569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1854374860817 - 2⁶ = 1854374860753 is a prime.

It is a super-2 number, since 2×1854374860817² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1854374860817.

It is not a weakly prime, because it can be changed into another prime (1854374860517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927187430408 + 927187430409.

It is an arithmetic number, because the mean of its divisors is an integer number (927187430409).

Almost surely, 2^{1854374860817} is an apocalyptic number.

It is an amenable number.

1854374860817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1854374860817 is an equidigital number, since it uses as much as digits as its factorization.

1854374860817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36126720, while the sum is 62.

The spelling of 1854374860817 in words is "one trillion, eight hundred fifty-four billion, three hundred seventy-four million, eight hundred sixty thousand, eight hundred seventeen".