11138227278 has 16 divisors (see below), whose sum is σ = 22497014736. Its totient is φ = 3675982400.

The previous prime is 11138227249. The next prime is 11138227307. The reversal of 11138227278 is 87272283111.

It is an interprime number because it is at equal distance from previous prime (11138227249) and next prime (11138227307).

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, 9189351 + ... + 9190562.

It is an arithmetic number, because the mean of its divisors is an integer number (1406063421).

Almost surely, 2^11138227278 is an apocalyptic number.

11138227278 is an abundant number, since it is smaller than the sum of its proper divisors (11358787458).

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

11138227278 is a wasteful number, since it uses less digits than its factorization.

11138227278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18380019.

The product of its digits is 75264, while the sum is 42.

The spelling of 11138227278 in words is "eleven billion, one hundred thirty-eight million, two hundred twenty-seven thousand, two hundred seventy-eight".