1851212164463 has 4 divisors (see below), whose sum is σ = 1852552652568. Its totient is φ = 1849871676360.

The previous prime is 1851212164397. The next prime is 1851212164469. The reversal of 1851212164463 is 3644612121581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1851212164463 - 2¹⁰ = 1851212163439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851212164469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670241981 + ... + 670244742.

It is an arithmetic number, because the mean of its divisors is an integer number (463138163142).

Almost surely, 2^{1851212164463} is an apocalyptic number.

1851212164463 is a deficient number, since it is larger than the sum of its proper divisors (1340488105).

1851212164463 is a wasteful number, since it uses less digits than its factorization.

1851212164463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340488104.

The product of its digits is 276480, while the sum is 44.

The spelling of 1851212164463 in words is "one trillion, eight hundred fifty-one billion, two hundred twelve million, one hundred sixty-four thousand, four hundred sixty-three".