2153966878 has 32 divisors (see below), whose sum is σ = 3914625024. Its totient is φ = 867737472.

The previous prime is 2153966873. The next prime is 2153966887. The reversal of 2153966878 is 8786693512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153966873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200151 + ... + 210637.

It is an arithmetic number, because the mean of its divisors is an integer number (122332032).

Almost surely, 2^2153966878 is an apocalyptic number.

2153966878 is a deficient number, since it is larger than the sum of its proper divisors (1760658146).

2153966878 is a wasteful number, since it uses less digits than its factorization.

2153966878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11376.

The product of its digits is 4354560, while the sum is 55.

The square root of 2153966878 is about 46410.8487101884. The cubic root of 2153966878 is about 1291.4561762661.

The spelling of 2153966878 in words is "two billion, one hundred fifty-three million, nine hundred sixty-six thousand, eight hundred seventy-eight".