1377561062609 has 2 divisors, whose sum is σ = 1377561062610. Its totient is φ = 1377561062608.

The previous prime is 1377561062557. The next prime is 1377561062651. The reversal of 1377561062609 is 9062601657731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1124295467584 + 253265595025 = 1060328^2 + 503255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377561062609 - 2¹⁶ = 1377560997073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377561062209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688780531304 + 688780531305.

It is an arithmetic number, because the mean of its divisors is an integer number (688780531305).

Almost surely, 2^{1377561062609} is an apocalyptic number.

It is an amenable number.

1377561062609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377561062609 is an equidigital number, since it uses as much as digits as its factorization.

1377561062609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 1377561062609 in words is "one trillion, three hundred seventy-seven billion, five hundred sixty-one million, sixty-two thousand, six hundred nine".