32478778812 has 24 divisors (see below), whose sum is σ = 75906660816. Its totient is φ = 10808710528.

The previous prime is 32478778799. The next prime is 32478778873. The reversal of 32478778812 is 21887787423.

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, 2185923 + ... + 2200730.

It is an arithmetic number, because the mean of its divisors is an integer number (3162777534).

Almost surely, 2^32478778812 is an apocalyptic number.

It is an amenable number.

32478778812 is an abundant number, since it is smaller than the sum of its proper divisors (43427882004).

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

32478778812 is a wasteful number, since it uses less digits than its factorization.

32478778812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387277 (or 4387275 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 57.

The spelling of 32478778812 in words is "thirty-two billion, four hundred seventy-eight million, seven hundred seventy-eight thousand, eight hundred twelve".