1887664125 has 16 divisors (see below), whose sum is σ = 3141073728. Its totient is φ = 1006754000.

The previous prime is 1887664111. The next prime is 1887664151. The reversal of 1887664125 is 5214667881.

It is not a de Polignac number, because 1887664125 - 2¹³ = 1887655933 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2516511 + ... + 2517260.

It is an arithmetic number, because the mean of its divisors is an integer number (196317108).

Almost surely, 2^1887664125 is an apocalyptic number.

1887664125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1887664125 is a deficient number, since it is larger than the sum of its proper divisors (1253409603).

1887664125 is an equidigital number, since it uses as much as digits as its factorization.

1887664125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033789 (or 5033779 counting only the distinct ones).

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

The square root of 1887664125 is about 43447.2568178936. The cubic root of 1887664125 is about 1235.8760250754.

The spelling of 1887664125 in words is "one billion, eight hundred eighty-seven million, six hundred sixty-four thousand, one hundred twenty-five".