1854012840997 has 2 divisors, whose sum is σ = 1854012840998. Its totient is φ = 1854012840996.

The previous prime is 1854012840929. The next prime is 1854012841063. The reversal of 1854012840997 is 7990482104581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1853080515841 + 932325156 = 1361279^2 + 30534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1854012840997 is a prime.

It is a super-2 number, since 2×1854012840997² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1854012840697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927006420498 + 927006420499.

It is an arithmetic number, because the mean of its divisors is an integer number (927006420499).

Almost surely, 2^{1854012840997} is an apocalyptic number.

It is an amenable number.

1854012840997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1854012840997 is an equidigital number, since it uses as much as digits as its factorization.

1854012840997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 1854012840997 in words is "one trillion, eight hundred fifty-four billion, twelve million, eight hundred forty thousand, nine hundred ninety-seven".