1228011233778 has 48 divisors (see below), whose sum is σ = 3044098811520. Its totient is φ = 350478534528.

The previous prime is 1228011233773. The next prime is 1228011233831. The reversal of 1228011233778 is 8773321108221.

1228011233778 is a `hidden beast` number, since 122 + 80 + 112 + 337 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1228011233773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5186775 + ... + 5418362.

It is an arithmetic number, because the mean of its divisors is an integer number (63418725240).

Almost surely, 2^{1228011233778} is an apocalyptic number.

1228011233778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1228011233778 is an abundant number, since it is smaller than the sum of its proper divisors (1816087577742).

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

1228011233778 is a wasteful number, since it uses less digits than its factorization.

1228011233778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606071 (or 10606068 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 1228011233778 in words is "one trillion, two hundred twenty-eight billion, eleven million, two hundred thirty-three thousand, seven hundred seventy-eight".