1881858855 has 16 divisors (see below), whose sum is σ = 3012332544. Its totient is φ = 1003205280.

The previous prime is 1881858841. The next prime is 1881858859. The reversal of 1881858855 is 5588581881.

It is a happy number.

It is not a de Polignac number, because 1881858855 - 2¹¹ = 1881856807 is a prime.

It is a super-2 number, since 2×1881858855² = 7082785500283822050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1881858795 and 1881858804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881858859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7522 + ... + 61808.

It is an arithmetic number, because the mean of its divisors is an integer number (188270784).

Almost surely, 2^1881858855 is an apocalyptic number.

1881858855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1881858855 is a deficient number, since it is larger than the sum of its proper divisors (1130473689).

1881858855 is a wasteful number, since it uses less digits than its factorization.

1881858855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56606.

The product of its digits is 4096000, while the sum is 57.

The square root of 1881858855 is about 43380.3971281960. The cubic root of 1881858855 is about 1234.6077977889.

The spelling of 1881858855 in words is "one billion, eight hundred eighty-one million, eight hundred fifty-eight thousand, eight hundred fifty-five".