445367265661 has 2 divisors, whose sum is σ = 445367265662. Its totient is φ = 445367265660.

The previous prime is 445367265647. The next prime is 445367265817. The reversal of 445367265661 is 166562763544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439013581561 + 6353684100 = 662581^2 + 79710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445367265661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445367269661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222683632830 + 222683632831.

It is an arithmetic number, because the mean of its divisors is an integer number (222683632831).

Almost surely, 2^445367265661 is an apocalyptic number.

It is an amenable number.

445367265661 is a deficient number, since it is larger than the sum of its proper divisors (1).

445367265661 is an equidigital number, since it uses as much as digits as its factorization.

445367265661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 55.

It can be divided in two parts, 445367 and 265661, that added together give a triangular number (711028 = T₁₁₉₂).

The spelling of 445367265661 in words is "four hundred forty-five billion, three hundred sixty-seven million, two hundred sixty-five thousand, six hundred sixty-one".