1986125560513 has 2 divisors, whose sum is σ = 1986125560514. Its totient is φ = 1986125560512.

The previous prime is 1986125560493. The next prime is 1986125560519. The reversal of 1986125560513 is 3150655216891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1965219870769 + 20905689744 = 1401863^2 + 144588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1986125560513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1986125560519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993062780256 + 993062780257.

It is an arithmetic number, because the mean of its divisors is an integer number (993062780257).

Almost surely, 2^{1986125560513} is an apocalyptic number.

It is an amenable number.

1986125560513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986125560513 is an equidigital number, since it uses as much as digits as its factorization.

1986125560513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 1986125560513 in words is "one trillion, nine hundred eighty-six billion, one hundred twenty-five million, five hundred sixty thousand, five hundred thirteen".