1445672456861 has 2 divisors, whose sum is σ = 1445672456862. Its totient is φ = 1445672456860.

The previous prime is 1445672456801. The next prime is 1445672456881. The reversal of 1445672456861 is 1686542765441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1217767425625 + 227905031236 = 1103525^2 + 477394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445672456861 - 2⁶ = 1445672456797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1445672456861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445672456801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722836228430 + 722836228431.

It is an arithmetic number, because the mean of its divisors is an integer number (722836228431).

Almost surely, 2^{1445672456861} is an apocalyptic number.

It is an amenable number.

1445672456861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445672456861 is an equidigital number, since it uses as much as digits as its factorization.

1445672456861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38707200, while the sum is 59.

The spelling of 1445672456861 in words is "one trillion, four hundred forty-five billion, six hundred seventy-two million, four hundred fifty-six thousand, eight hundred sixty-one".