13556978266 has 32 divisors (see below), whose sum is σ = 22504059648. Its totient is φ = 6084590400.

The previous prime is 13556978257. The next prime is 13556978291. The reversal of 13556978266 is 66287965531.

It is a self number, because there is not a number n which added to its sum of digits gives 13556978266.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2740191 + ... + 2745133.

It is an arithmetic number, because the mean of its divisors is an integer number (703251864).

Almost surely, 2^13556978266 is an apocalyptic number.

13556978266 is a deficient number, since it is larger than the sum of its proper divisors (8947081382).

13556978266 is a wasteful number, since it uses less digits than its factorization.

13556978266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846.

The product of its digits is 16329600, while the sum is 58.

The spelling of 13556978266 in words is "thirteen billion, five hundred fifty-six million, nine hundred seventy-eight thousand, two hundred sixty-six".