11278006780521 has 16 divisors (see below), whose sum is σ = 16194388400960. Its totient is φ = 6940171558080.

The previous prime is 11278006780511. The next prime is 11278006780531. The reversal of 11278006780521 is 12508760087211.

It is an interprime number because it is at equal distance from previous prime (11278006780511) and next prime (11278006780531).

It is not a de Polignac number, because 11278006780521 - 2⁵ = 11278006780489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11278006780511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952366 + ... + 4843863.

It is an arithmetic number, because the mean of its divisors is an integer number (1012149275060).

Almost surely, 2^{11278006780521} is an apocalyptic number.

It is an amenable number.

11278006780521 is a deficient number, since it is larger than the sum of its proper divisors (4916381620439).

11278006780521 is a wasteful number, since it uses less digits than its factorization.

11278006780521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5846136.

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 11278006780521 in words is "eleven trillion, two hundred seventy-eight billion, six million, seven hundred eighty thousand, five hundred twenty-one".