75565406673643 has 16 divisors (see below), whose sum is σ = 80912987907840. Its totient is φ = 70318179982336.

The previous prime is 75565406673599. The next prime is 75565406673733. The reversal of 75565406673643 is 34637660456557.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 75565406673643 - 2³³ = 75556816739051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75565406673343) 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, 33624321 + ... + 35801197.

It is an arithmetic number, because the mean of its divisors is an integer number (5057061744240).

Almost surely, 2^{75565406673643} is an apocalyptic number.

75565406673643 is a deficient number, since it is larger than the sum of its proper divisors (5347581234197).

75565406673643 is a wasteful number, since it uses less digits than its factorization.

75565406673643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199926.

The product of its (nonzero) digits is 1143072000, while the sum is 67.

The spelling of 75565406673643 in words is "seventy-five trillion, five hundred sixty-five billion, four hundred six million, six hundred seventy-three thousand, six hundred forty-three".