1858386144381 has 16 divisors (see below), whose sum is σ = 2680207207104. Its totient is φ = 1138584253824.

The previous prime is 1858386144347. The next prime is 1858386144427. The reversal of 1858386144381 is 1834416838581.

It is a de Polignac number, because none of the positive numbers 2^k-1858386144381 is a prime.

It is a super-2 number, since 2×1858386144381² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858386144581) 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, 104949136 + ... + 104966841.

It is an arithmetic number, because the mean of its divisors is an integer number (167512950444).

Almost surely, 2^{1858386144381} is an apocalyptic number.

It is an amenable number.

1858386144381 is a deficient number, since it is larger than the sum of its proper divisors (821821062723).

1858386144381 is a wasteful number, since it uses less digits than its factorization.

1858386144381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209916220.

The product of its digits is 17694720, while the sum is 60.

The spelling of 1858386144381 in words is "one trillion, eight hundred fifty-eight billion, three hundred eighty-six million, one hundred forty-four thousand, three hundred eighty-one".