1854540039816 has 24 divisors (see below), whose sum is σ = 5022712608030. Its totient is φ = 618180013248.

The previous prime is 1854540039731. The next prime is 1854540039817. The reversal of 1854540039816 is 6189300454581.

It is a happy number.

1854540039816 is a `hidden beast` number, since 1 + 8 + 5 + 4 + 540 + 0 + 3 + 98 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1842887700900 + 11652338916 = 1357530^2 + 107946^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1854540039817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12878750205 + ... + 12878750348.

Almost surely, 2^{1854540039816} is an apocalyptic number.

It is an amenable number.

1854540039816 is an abundant number, since it is smaller than the sum of its proper divisors (3168172568214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1854540039816 is a wasteful number, since it uses less digits than its factorization.

1854540039816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25757500565 (or 25757500558 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 1854540039816 in words is "one trillion, eight hundred fifty-four billion, five hundred forty million, thirty-nine thousand, eight hundred sixteen".