1125978675541 has 2 divisors, whose sum is σ = 1125978675542. Its totient is φ = 1125978675540.

The previous prime is 1125978675439. The next prime is 1125978675553. The reversal of 1125978675541 is 1455768795211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597637224900 + 528341450641 = 773070^2 + 726871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125978675541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1125978675541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125978673541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562989337770 + 562989337771.

It is an arithmetic number, because the mean of its divisors is an integer number (562989337771).

Almost surely, 2^{1125978675541} is an apocalyptic number.

It is an amenable number.

1125978675541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125978675541 is an equidigital number, since it uses as much as digits as its factorization.

1125978675541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168000, while the sum is 61.

The spelling of 1125978675541 in words is "one trillion, one hundred twenty-five billion, nine hundred seventy-eight million, six hundred seventy-five thousand, five hundred forty-one".