2678815964 has 24 divisors (see below), whose sum is σ = 5127628800. Its totient is φ = 1214423280.

The previous prime is 2678815949. The next prime is 2678815973. The reversal of 2678815964 is 4695188762.

It is a happy number.

It is a congruent number.

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, 63644 + ... + 96995.

It is an arithmetic number, because the mean of its divisors is an integer number (213651200).

Almost surely, 2^2678815964 is an apocalyptic number.

It is an amenable number.

2678815964 is a deficient number, since it is larger than the sum of its proper divisors (2448812836).

2678815964 is a wasteful number, since it uses less digits than its factorization.

2678815964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161033 (or 161031 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 56.

The square root of 2678815964 is about 51757.2793334426. The cubic root of 2678815964 is about 1388.8253215958.

The spelling of 2678815964 in words is "two billion, six hundred seventy-eight million, eight hundred fifteen thousand, nine hundred sixty-four".