12780250540 has 12 divisors (see below), whose sum is σ = 26838526176. Its totient is φ = 5112100208.

The previous prime is 12780250523. The next prime is 12780250577. The reversal of 12780250540 is 4505208721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12780250496 and 12780250505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319506244 + ... + 319506283.

It is an arithmetic number, because the mean of its divisors is an integer number (2236543848).

Almost surely, 2^12780250540 is an apocalyptic number.

12780250540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12780250540 is an abundant number, since it is smaller than the sum of its proper divisors (14058275636).

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

12780250540 is a wasteful number, since it uses less digits than its factorization.

12780250540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639012536 (or 639012534 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 34.

The spelling of 12780250540 in words is "twelve billion, seven hundred eighty million, two hundred fifty thousand, five hundred forty".