1881457083556 has 12 divisors (see below), whose sum is σ = 3325149400860. Its totient is φ = 931414397600.

The previous prime is 1881457083533. The next prime is 1881457083593. The reversal of 1881457083556 is 6553807541881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1556545683456 + 324911400100 = 1247616^2 + 570010^2 .

It is a super-3 number, since 3×1881457083556³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1881457083494 and 1881457083503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2328535591 + ... + 2328536398.

It is an arithmetic number, because the mean of its divisors is an integer number (277095783405).

Almost surely, 2^{1881457083556} is an apocalyptic number.

It is an amenable number.

1881457083556 is a deficient number, since it is larger than the sum of its proper divisors (1443692317304).

1881457083556 is a wasteful number, since it uses less digits than its factorization.

1881457083556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657072094 (or 4657072092 counting only the distinct ones).

The product of its (nonzero) digits is 32256000, while the sum is 61.

The spelling of 1881457083556 in words is "one trillion, eight hundred eighty-one billion, four hundred fifty-seven million, eighty-three thousand, five hundred fifty-six".