1856001376856 has 32 divisors (see below), whose sum is σ = 3833954257680. Its totient is φ = 835284144000.

The previous prime is 1856001376837. The next prime is 1856001376903. The reversal of 1856001376856 is 6586731006581.

It is a super-2 number, since 2×1856001376856² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104401631 + ... + 104419406.

Almost surely, 2^{1856001376856} is an apocalyptic number.

It is an amenable number.

1856001376856 is an abundant number, since it is smaller than the sum of its proper divisors (1977952880824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1856001376856 is a wasteful number, since it uses less digits than its factorization.

1856001376856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208821155 (or 208821151 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 1856001376856 in words is "one trillion, eight hundred fifty-six billion, one million, three hundred seventy-six thousand, eight hundred fifty-six".