3891859545 has 24 divisors (see below), whose sum is σ = 7243625664. Its totient is φ = 1779135456.

The previous prime is 3891859507. The next prime is 3891859561. The reversal of 3891859545 is 5459581983.

It is a happy number.

It is not a de Polignac number, because 3891859545 - 2¹⁵ = 3891826777 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2646789 + ... + 2648258.

It is an arithmetic number, because the mean of its divisors is an integer number (301817736).

Almost surely, 2^3891859545 is an apocalyptic number.

3891859545 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3891859545 is a deficient number, since it is larger than the sum of its proper divisors (3351766119).

3891859545 is a wasteful number, since it uses less digits than its factorization.

3891859545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295069 (or 5295062 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 57.

The square root of 3891859545 is about 62384.7701366287. The cubic root of 3891859545 is about 1572.9649766612.

The spelling of 3891859545 in words is "three billion, eight hundred ninety-one million, eight hundred fifty-nine thousand, five hundred forty-five".