461661011573 has 2 divisors, whose sum is σ = 461661011574. Its totient is φ = 461661011572.

The previous prime is 461661011561. The next prime is 461661011587. The reversal of 461661011573 is 375110166164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274468066609 + 187192944964 = 523897^2 + 432658^2 .

It is a cyclic number.

It is not a de Polignac number, because 461661011573 - 2¹⁰ = 461661010549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 461661011573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461661011503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230830505786 + 230830505787.

It is an arithmetic number, because the mean of its divisors is an integer number (230830505787).

Almost surely, 2^461661011573 is an apocalyptic number.

It is an amenable number.

461661011573 is a deficient number, since it is larger than the sum of its proper divisors (1).

461661011573 is an equidigital number, since it uses as much as digits as its factorization.

461661011573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 461661011573 in words is "four hundred sixty-one billion, six hundred sixty-one million, eleven thousand, five hundred seventy-three".