11391278104 has 32 divisors (see below), whose sum is σ = 22409101440. Its totient is φ = 5421542400.

The previous prime is 11391278071. The next prime is 11391278113. The reversal of 11391278104 is 40187219311.

It is a super-2 number, since 2×11391278104² (a number of 21 digits) contains 22 as substring.

It is a congruent 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, 361369 + ... + 391624.

It is an arithmetic number, because the mean of its divisors is an integer number (700284420).

Almost surely, 2^11391278104 is an apocalyptic number.

It is an amenable number.

11391278104 is a deficient number, since it is larger than the sum of its proper divisors (11017823336).

11391278104 is a wasteful number, since it uses less digits than its factorization.

11391278104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753091 (or 753087 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 11391278104 in words is "eleven billion, three hundred ninety-one million, two hundred seventy-eight thousand, one hundred four".