1125866780778 has 8 divisors (see below), whose sum is σ = 2251733561568. Its totient is φ = 375288926924.

The previous prime is 1125866780771. The next prime is 1125866780809. The reversal of 1125866780778 is 8770876685211.

It is a sphenic number, since it is the product of 3 distinct primes.

1125866780778 is an admirable number.

It is a super-2 number, since 2×1125866780778² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1125866780771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93822231726 + ... + 93822231737.

It is an arithmetic number, because the mean of its divisors is an integer number (281466695196).

Almost surely, 2^{1125866780778} is an apocalyptic number.

1125866780778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1125866780778 is a wasteful number, since it uses less digits than its factorization.

1125866780778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187644463468.

The product of its (nonzero) digits is 63221760, while the sum is 66.

The spelling of 1125866780778 in words is "one trillion, one hundred twenty-five billion, eight hundred sixty-six million, seven hundred eighty thousand, seven hundred seventy-eight".