1125978675517 has 4 divisors (see below), whose sum is σ = 1128139863516. Its totient is φ = 1123817487520.

The previous prime is 1125978675439. The next prime is 1125978675541. The reversal of 1125978675517 is 7155768795211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 746653256281 + 379325419236 = 864091^2 + 615894^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125978675517 - 2³¹ = 1123831191869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125978675557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080593218 + ... + 1080594259.

It is an arithmetic number, because the mean of its divisors is an integer number (282034965879).

Almost surely, 2^{1125978675517} is an apocalyptic number.

It is an amenable number.

1125978675517 is a deficient number, since it is larger than the sum of its proper divisors (2161187999).

1125978675517 is an equidigital number, since it uses as much as digits as its factorization.

1125978675517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161187998.

The product of its digits is 37044000, while the sum is 64.

The spelling of 1125978675517 in words is "one trillion, one hundred twenty-five billion, nine hundred seventy-eight million, six hundred seventy-five thousand, five hundred seventeen".