1266015061189 has 2 divisors, whose sum is σ = 1266015061190. Its totient is φ = 1266015061188.

The previous prime is 1266015061063. The next prime is 1266015061211. The reversal of 1266015061189 is 9811605106621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 781912210564 + 484102850625 = 884258^2 + 695775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266015061189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266019061189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633007530594 + 633007530595.

It is an arithmetic number, because the mean of its divisors is an integer number (633007530595).

Almost surely, 2^{1266015061189} is an apocalyptic number.

It is an amenable number.

1266015061189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266015061189 is an equidigital number, since it uses as much as digits as its factorization.

1266015061189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 1266015061189 in words is "one trillion, two hundred sixty-six billion, fifteen million, sixty-one thousand, one hundred eighty-nine".