1856001376855 has 4 divisors (see below), whose sum is σ = 2227201652232. Its totient is φ = 1484801101480.

The previous prime is 1856001376837. The next prime is 1856001376903. The reversal of 1856001376855 is 5586731006581.

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

It is not a de Polignac number, because 1856001376855 - 2¹⁹ = 1856000852567 is a prime.

It is a super-2 number, since 2×1856001376855² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1856001376796 and 1856001376805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185600137681 + ... + 185600137690.

It is an arithmetic number, because the mean of its divisors is an integer number (556800413058).

Almost surely, 2^{1856001376855} is an apocalyptic number.

1856001376855 is a deficient number, since it is larger than the sum of its proper divisors (371200275377).

1856001376855 is an equidigital number, since it uses as much as digits as its factorization.

1856001376855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371200275376.

The product of its (nonzero) digits is 6048000, while the sum is 55.

The spelling of 1856001376855 in words is "one trillion, eight hundred fifty-six billion, one million, three hundred seventy-six thousand, eight hundred fifty-five".