1465707537661 has 2 divisors, whose sum is σ = 1465707537662. Its totient is φ = 1465707537660.

The previous prime is 1465707537611. The next prime is 1465707537683. The reversal of 1465707537661 is 1667357075641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 834334269561 + 631373268100 = 913419^2 + 794590^2 .

It is an emirp because it is prime and its reverse (1667357075641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1465707537661 - 2¹⁹ = 1465707013373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1465707537596 and 1465707537605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1465707537611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 732853768830 + 732853768831.

It is an arithmetic number, because the mean of its divisors is an integer number (732853768831).

Almost surely, 2^{1465707537661} is an apocalyptic number.

It is an amenable number.

1465707537661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1465707537661 is an equidigital number, since it uses as much as digits as its factorization.

1465707537661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22226400, while the sum is 58.

The spelling of 1465707537661 in words is "one trillion, four hundred sixty-five billion, seven hundred seven million, five hundred thirty-seven thousand, six hundred sixty-one".