1681566093573 has 16 divisors (see below), whose sum is σ = 2247776479872. Its totient is φ = 1118201672000.

The previous prime is 1681566093563. The next prime is 1681566093587. The reversal of 1681566093573 is 3753906651861.

It is a cyclic number.

It is not a de Polignac number, because 1681566093573 - 2³² = 1677271126277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681566093563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3569008 + ... + 4012598.

It is an arithmetic number, because the mean of its divisors is an integer number (140486029992).

Almost surely, 2^{1681566093573} is an apocalyptic number.

It is an amenable number.

1681566093573 is a deficient number, since it is larger than the sum of its proper divisors (566210386299).

1681566093573 is a wasteful number, since it uses less digits than its factorization.

1681566093573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446796.

The product of its (nonzero) digits is 24494400, while the sum is 60.

The spelling of 1681566093573 in words is "one trillion, six hundred eighty-one billion, five hundred sixty-six million, ninety-three thousand, five hundred seventy-three".