1371165661447 has 2 divisors, whose sum is σ = 1371165661448. Its totient is φ = 1371165661446.

The previous prime is 1371165661391. The next prime is 1371165661517. The reversal of 1371165661447 is 7441665611731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1371165661447 - 2¹⁹ = 1371165137159 is a prime.

It is a super-2 number, since 2×1371165661447² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1371165661394 and 1371165661403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371165661147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685582830723 + 685582830724.

It is an arithmetic number, because the mean of its divisors is an integer number (685582830724).

Almost surely, 2^{1371165661447} is an apocalyptic number.

1371165661447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371165661447 is an equidigital number, since it uses as much as digits as its factorization.

1371165661447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 52.

The spelling of 1371165661447 in words is "one trillion, three hundred seventy-one billion, one hundred sixty-five million, six hundred sixty-one thousand, four hundred forty-seven".