4155981864 has 32 divisors (see below), whose sum is σ = 10487063520. Its totient is φ = 1372379456.

The previous prime is 4155981859. The next prime is 4155981877. The reversal of 4155981864 is 4681895514.

It is a happy number.

4155981864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806619 + ... + 811754.

It is an arithmetic number, because the mean of its divisors is an integer number (327720735).

Almost surely, 2^4155981864 is an apocalyptic number.

It is an amenable number.

4155981864 is an abundant number, since it is smaller than the sum of its proper divisors (6331081656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4155981864 is a wasteful number, since it uses less digits than its factorization.

4155981864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618489 (or 1618485 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 51.

The square root of 4155981864 is about 64466.9051839779. The cubic root of 4155981864 is about 1607.7723217902.

The spelling of 4155981864 in words is "four billion, one hundred fifty-five million, nine hundred eighty-one thousand, eight hundred sixty-four".