1856155127856 has 40 divisors (see below), whose sum is σ = 4819407881904. Its totient is φ = 615577670400.

The previous prime is 1856155127821. The next prime is 1856155127863. The reversal of 1856155127856 is 6587215516581.

It is a happy number.

It is a super-2 number, since 2×1856155127856² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1856155127856.

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, 98137495 + ... + 98156406.

Almost surely, 2^{1856155127856} is an apocalyptic number.

1856155127856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1856155127856 is an abundant number, since it is smaller than the sum of its proper divisors (2963252754048).

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

1856155127856 is a wasteful number, since it uses less digits than its factorization.

1856155127856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196294109 (or 196294103 counting only the distinct ones).

The product of its digits is 20160000, while the sum is 60.

The spelling of 1856155127856 in words is "one trillion, eight hundred fifty-six billion, one hundred fifty-five million, one hundred twenty-seven thousand, eight hundred fifty-six".