1605973096561 has 8 divisors (see below), whose sum is σ = 1705458157920. Its totient is φ = 1507984051392.

The previous prime is 1605973096549. The next prime is 1605973096597. The reversal of 1605973096561 is 1656903795061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1605973096561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1605973096496 and 1605973096505.

It is not an unprimeable number, because it can be changed into a prime (1605973096261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374001835 + ... + 374006128.

It is an arithmetic number, because the mean of its divisors is an integer number (213182269740).

Almost surely, 2^{1605973096561} is an apocalyptic number.

It is an amenable number.

1605973096561 is a deficient number, since it is larger than the sum of its proper divisors (99485061359).

1605973096561 is a wasteful number, since it uses less digits than its factorization.

1605973096561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748008095.

The product of its (nonzero) digits is 9185400, while the sum is 58.

The spelling of 1605973096561 in words is "one trillion, six hundred five billion, nine hundred seventy-three million, ninety-six thousand, five hundred sixty-one".