12780577578 has 24 divisors (see below), whose sum is σ = 26720836128. Its totient is φ = 4074965752.

The previous prime is 12780577567. The next prime is 12780577597. The reversal of 12780577578 is 87577508721.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2010150 + ... + 2016497.

It is an arithmetic number, because the mean of its divisors is an integer number (1113368172).

Almost surely, 2^12780577578 is an apocalyptic number.

12780577578 is an abundant number, since it is smaller than the sum of its proper divisors (13940258550).

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

12780577578 is a wasteful number, since it uses less digits than its factorization.

12780577578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026698 (or 4026675 counting only the distinct ones).

The product of its (nonzero) digits is 7683200, while the sum is 57.

The spelling of 12780577578 in words is "twelve billion, seven hundred eighty million, five hundred seventy-seven thousand, five hundred seventy-eight".