1861854111151 has 16 divisors (see below), whose sum is σ = 1869984900000. Its totient is φ = 1853746126848.

The previous prime is 1861854111137. The next prime is 1861854111157. The reversal of 1861854111151 is 1511114581681.

It is a cyclic number.

It is not a de Polignac number, because 1861854111151 - 2⁹ = 1861854110639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1861854111098 and 1861854111107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861854111157) 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, 532108600 + ... + 532112098.

It is an arithmetic number, because the mean of its divisors is an integer number (116874056250).

Almost surely, 2^{1861854111151} is an apocalyptic number.

1861854111151 is a deficient number, since it is larger than the sum of its proper divisors (8130788849).

1861854111151 is a wasteful number, since it uses less digits than its factorization.

1861854111151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138.

The product of its digits is 38400, while the sum is 43.

The spelling of 1861854111151 in words is "one trillion, eight hundred sixty-one billion, eight hundred fifty-four million, one hundred eleven thousand, one hundred fifty-one".