1128791194578 has 48 divisors (see below), whose sum is σ = 2590060427136. Its totient is φ = 354064844160.

The previous prime is 1128791194567. The next prime is 1128791194607. The reversal of 1128791194578 is 8754911978211.

1128791194578 is a `hidden beast` number, since 1 + 1 + 2 + 87 + 91 + 19 + 457 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1322275 + ... + 2001497.

It is an arithmetic number, because the mean of its divisors is an integer number (53959592232).

Almost surely, 2^{1128791194578} is an apocalyptic number.

1128791194578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1128791194578 is an abundant number, since it is smaller than the sum of its proper divisors (1461269232558).

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

1128791194578 is a wasteful number, since it uses less digits than its factorization.

1128791194578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684679 (or 684676 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 63.

The spelling of 1128791194578 in words is "one trillion, one hundred twenty-eight billion, seven hundred ninety-one million, one hundred ninety-four thousand, five hundred seventy-eight".