12780209408658 has 16 divisors (see below), whose sum is σ = 25560460152480. Its totient is φ = 4260062913696.

The previous prime is 12780209408621. The next prime is 12780209408821. The reversal of 12780209408658 is 85680490208721.

It is a Curzon 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, 3528513 + ... + 6165291.

It is an arithmetic number, because the mean of its divisors is an integer number (1597528759530).

Almost surely, 2^{12780209408658} is an apocalyptic number.

12780209408658 is an abundant number, since it is smaller than the sum of its proper divisors (12780250743822).

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

12780209408658 is a wasteful number, since it uses less digits than its factorization.

12780209408658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444601.

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 12780209408658 in words is "twelve trillion, seven hundred eighty billion, two hundred nine million, four hundred eight thousand, six hundred fifty-eight".