11278956738 has 64 divisors (see below), whose sum is σ = 27219962880. Its totient is φ = 3043656000.

The previous prime is 11278956737. The next prime is 11278956743. The reversal of 11278956738 is 83765987211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (11278956737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242788 + ... + 285488.

It is an arithmetic number, because the mean of its divisors is an integer number (425311920).

Almost surely, 2^11278956738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11278956738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13609981440).

11278956738 is an abundant number, since it is smaller than the sum of its proper divisors (15941006142).

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

11278956738 is a wasteful number, since it uses less digits than its factorization.

11278956738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43063.

The product of its digits is 5080320, while the sum is 57.

The spelling of 11278956738 in words is "eleven billion, two hundred seventy-eight million, nine hundred fifty-six thousand, seven hundred thirty-eight".