4156878668 has 12 divisors (see below), whose sum is σ = 7289356872. Its totient is φ = 2074205280.

The previous prime is 4156878667. The next prime is 4156878703. The reversal of 4156878668 is 8668786514.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4156878667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056305 + ... + 1060232.

It is an arithmetic number, because the mean of its divisors is an integer number (607446406).

Almost surely, 2^4156878668 is an apocalyptic number.

It is an amenable number.

4156878668 is a deficient number, since it is larger than the sum of its proper divisors (3132478204).

4156878668 is a wasteful number, since it uses less digits than its factorization.

4156878668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117032 (or 2117030 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 59.

The square root of 4156878668 is about 64473.8603466552. The cubic root of 4156878668 is about 1607.8879585598.

The spelling of 4156878668 in words is "four billion, one hundred fifty-six million, eight hundred seventy-eight thousand, six hundred sixty-eight".