1856372743572 has 12 divisors (see below), whose sum is σ = 4331536401696. Its totient is φ = 618790914520.

The previous prime is 1856372743567. The next prime is 1856372743627. The reversal of 1856372743572 is 2753472736581.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1856372743572² (a number of 25 digits) contains 22 as substring.

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, 77348864304 + ... + 77348864327.

It is an arithmetic number, because the mean of its divisors is an integer number (360961366808).

Almost surely, 2^{1856372743572} is an apocalyptic number.

1856372743572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1856372743572 is an abundant number, since it is smaller than the sum of its proper divisors (2475163658124).

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

1856372743572 is a wasteful number, since it uses less digits than its factorization.

1856372743572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154697728638 (or 154697728636 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 60.

The spelling of 1856372743572 in words is "one trillion, eight hundred fifty-six billion, three hundred seventy-two million, seven hundred forty-three thousand, five hundred seventy-two".