1881986141025 has 27 divisors (see below), whose sum is σ = 3370883145721. Its totient is φ = 1003714967040.

The previous prime is 1881986141017. The next prime is 1881986141051. The reversal of 1881986141025 is 5201416891881.

The square root of 1881986141025 is 1371855.

It is a perfect power (a square), and thus also a powerful number.

1881986141025 is a `hidden beast` number, since 1 + 8 + 8 + 1 + 9 + 8 + 614 + 10 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 400244757201 + 1481741383824 = 632649^2 + 1217268^2 .

It is not a de Polignac number, because 1881986141025 - 2³ = 1881986141017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20532097 + ... + 20623553.

Almost surely, 2^{1881986141025} is an apocalyptic number.

1881986141025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1881986141025 is the 1371855-th square number.

1881986141025 is the 685928-th centered octagonal number.

It is an amenable number.

1881986141025 is a deficient number, since it is larger than the sum of its proper divisors (1488897004696).

1881986141025 is an frugal number, since it uses more digits than its factorization.

1881986141025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182930 (or 91465 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 54.

The spelling of 1881986141025 in words is "one trillion, eight hundred eighty-one billion, nine hundred eighty-six million, one hundred forty-one thousand, twenty-five".