1854540039731 has 2 divisors, whose sum is σ = 1854540039732. Its totient is φ = 1854540039730.

The previous prime is 1854540039701. The next prime is 1854540039817. The reversal of 1854540039731 is 1379300454581.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1854540039731 is a prime.

It is a super-2 number, since 2×1854540039731² (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 1854540039731.

It is not a weakly prime, because it can be changed into another prime (1854540039701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 927270019865 + 927270019866.

It is an arithmetic number, because the mean of its divisors is an integer number (927270019866).

Almost surely, 2^{1854540039731} is an apocalyptic number.

1854540039731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1854540039731 is an equidigital number, since it uses as much as digits as its factorization.

1854540039731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 1854540039731 in words is "one trillion, eight hundred fifty-four billion, five hundred forty million, thirty-nine thousand, seven hundred thirty-one".