3964561878 has 16 divisors (see below), whose sum is σ = 7930511280. Its totient is φ = 1321289376.

The previous prime is 3964561873. The next prime is 3964561903. The reversal of 3964561878 is 8781654693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3964561873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18625 + ... + 90972.

It is an arithmetic number, because the mean of its divisors is an integer number (495656955).

Almost surely, 2^3964561878 is an apocalyptic number.

3964561878 is an abundant number, since it is smaller than the sum of its proper divisors (3965949402).

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

3964561878 is a wasteful number, since it uses less digits than its factorization.

3964561878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115631.

The product of its digits is 8709120, while the sum is 57.

The square root of 3964561878 is about 62964.7669574025. The cubic root of 3964561878 is about 1582.6992632841.

The spelling of 3964561878 in words is "three billion, nine hundred sixty-four million, five hundred sixty-one thousand, eight hundred seventy-eight".