1123153220778 has 16 divisors (see below), whose sum is σ = 2246322119520. Its totient is φ = 374381793936.

The previous prime is 1123153220773. The next prime is 1123153220797. The reversal of 1123153220778 is 8770223513211.

It is a super-2 number, since 2×1123153220778² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123153220773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411576 + ... + 1554252.

It is an arithmetic number, because the mean of its divisors is an integer number (140395132470).

Almost surely, 2^{1123153220778} is an apocalyptic number.

1123153220778 is an abundant number, since it is smaller than the sum of its proper divisors (1123168898742).

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

1123153220778 is a wasteful number, since it uses less digits than its factorization.

1123153220778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306501.

The product of its (nonzero) digits is 141120, while the sum is 42.

Adding to 1123153220778 its reverse (8770223513211), we get a palindrome (9893376733989).

The spelling of 1123153220778 in words is "one trillion, one hundred twenty-three billion, one hundred fifty-three million, two hundred twenty thousand, seven hundred seventy-eight".