1855738209464 has 16 divisors (see below), whose sum is σ = 3512027921400. Its totient is φ = 919197430432.

The previous prime is 1855738209389. The next prime is 1855738209569. The reversal of 1855738209464 is 4649028375581.

It is a junction number, because it is equal to n+sod(n) for n = 1855738209397 and 1855738209406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083958379 + ... + 1083960090.

It is a 1-persistent number, because it is pandigital, but 2⋅1855738209464 = 3711476418928 is not.

Almost surely, 2^{1855738209464} is an apocalyptic number.

It is an amenable number.

1855738209464 is a deficient number, since it is larger than the sum of its proper divisors (1656289711936).

1855738209464 is a wasteful number, since it uses less digits than its factorization.

1855738209464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167918582 (or 2167918578 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 62.

The spelling of 1855738209464 in words is "one trillion, eight hundred fifty-five billion, seven hundred thirty-eight million, two hundred nine thousand, four hundred sixty-four".