1326835573961 has 2 divisors, whose sum is σ = 1326835573962. Its totient is φ = 1326835573960.

The previous prime is 1326835573949. The next prime is 1326835573967. The reversal of 1326835573961 is 1693755386231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700015015561 + 626820558400 = 836669^2 + 791720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326835573961 - 2³⁸ = 1051957667017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1326835573961.

It is not a weakly prime, because it can be changed into another prime (1326835573967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663417786980 + 663417786981.

It is an arithmetic number, because the mean of its divisors is an integer number (663417786981).

Almost surely, 2^{1326835573961} is an apocalyptic number.

It is an amenable number.

1326835573961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326835573961 is an equidigital number, since it uses as much as digits as its factorization.

1326835573961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24494400, while the sum is 59.

The spelling of 1326835573961 in words is "one trillion, three hundred twenty-six billion, eight hundred thirty-five million, five hundred seventy-three thousand, nine hundred sixty-one".