1881373845 has 32 divisors (see below), whose sum is σ = 3244574592. Its totient is φ = 925408512.

The previous prime is 1881373783. The next prime is 1881373853. The reversal of 1881373845 is 5483731881.

It is a happy number.

It is not a de Polignac number, because 1881373845 - 2⁷ = 1881373717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1881373794 and 1881373803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264222 + ... + 271248.

It is an arithmetic number, because the mean of its divisors is an integer number (101392956).

Almost surely, 2^1881373845 is an apocalyptic number.

1881373845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1881373845 is a deficient number, since it is larger than the sum of its proper divisors (1363200747).

1881373845 is a wasteful number, since it uses less digits than its factorization.

1881373845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421.

The product of its digits is 645120, while the sum is 48.

The square root of 1881373845 is about 43374.8065701739. The cubic root of 1881373845 is about 1234.5017238439.

The spelling of 1881373845 in words is "one billion, eight hundred eighty-one million, three hundred seventy-three thousand, eight hundred forty-five".