1881992541 has 32 divisors (see below), whose sum is σ = 3103188480. Its totient is φ = 997444800.

The previous prime is 1881992509. The next prime is 1881992573. The reversal of 1881992541 is 1452991881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1881992509) and next prime (1881992573).

It is not a de Polignac number, because 1881992541 - 2⁵ = 1881992509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881992591) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 107295 + ... + 123596.

It is an arithmetic number, because the mean of its divisors is an integer number (96974640).

Almost surely, 2^1881992541 is an apocalyptic number.

1881992541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1881992541 is a deficient number, since it is larger than the sum of its proper divisors (1221195939).

1881992541 is a wasteful number, since it uses less digits than its factorization.

1881992541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230937.

The product of its digits is 207360, while the sum is 48.

The square root of 1881992541 is about 43381.9379580950. The cubic root of 1881992541 is about 1234.6370323353.

The spelling of 1881992541 in words is "one billion, eight hundred eighty-one million, nine hundred ninety-two thousand, five hundred forty-one".