1861622016271 has 16 divisors (see below), whose sum is σ = 1946373488640. Its totient is φ = 1779106230720.

The previous prime is 1861622016263. The next prime is 1861622016311. The reversal of 1861622016271 is 1726102261681.

It is a cyclic number.

It is not a de Polignac number, because 1861622016271 - 2³ = 1861622016263 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 (1861622086271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851451 + ... + 2674156.

It is an arithmetic number, because the mean of its divisors is an integer number (121648343040).

Almost surely, 2^{1861622016271} is an apocalyptic number.

1861622016271 is a deficient number, since it is larger than the sum of its proper divisors (84751472369).

1861622016271 is a wasteful number, since it uses less digits than its factorization.

1861622016271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525854.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 1861622016271 in words is "one trillion, eight hundred sixty-one billion, six hundred twenty-two million, sixteen thousand, two hundred seventy-one".