11438147778 has 16 divisors (see below), whose sum is σ = 22877405856. Its totient is φ = 3812530880.

The previous prime is 11438147767. The next prime is 11438147789. The reversal of 11438147778 is 87774183411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11438147767) and next prime (11438147789).

It is a self number, because there is not a number n which added to its sum of digits gives 11438147778.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 155050 + ... + 216602.

It is an arithmetic number, because the mean of its divisors is an integer number (1429837866).

Almost surely, 2^11438147778 is an apocalyptic number.

11438147778 is an abundant number, since it is smaller than the sum of its proper divisors (11439258078).

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

11438147778 is a wasteful number, since it uses less digits than its factorization.

11438147778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92529.

The product of its digits is 1053696, while the sum is 51.

The spelling of 11438147778 in words is "eleven billion, four hundred thirty-eight million, one hundred forty-seven thousand, seven hundred seventy-eight".