1566145632641 has 16 divisors (see below), whose sum is σ = 1633536979200. Its totient is φ = 1500311923968.

The previous prime is 1566145632637. The next prime is 1566145632643. The reversal of 1566145632641 is 1462365416651.

It is a cyclic number.

It is not a de Polignac number, because 1566145632641 - 2² = 1566145632637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1566145632641.

It is not an unprimeable number, because it can be changed into a prime (1566145632643) 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, 293465 + ... + 1793993.

It is an arithmetic number, because the mean of its divisors is an integer number (102096061200).

Almost surely, 2^{1566145632641} is an apocalyptic number.

It is an amenable number.

1566145632641 is a deficient number, since it is larger than the sum of its proper divisors (67391346559).

1566145632641 is a wasteful number, since it uses less digits than its factorization.

1566145632641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501048.

The product of its digits is 3110400, while the sum is 50.

The spelling of 1566145632641 in words is "one trillion, five hundred sixty-six billion, one hundred forty-five million, six hundred thirty-two thousand, six hundred forty-one".