423745043571 has 20 divisors (see below), whose sum is σ = 647722833912. Its totient is φ = 275927002848.

The previous prime is 423745043507. The next prime is 423745043573. The reversal of 423745043571 is 175340547324.

It is a happy number.

423745043571 is a `hidden beast` number, since 4 + 2 + 3 + 74 + 5 + 0 + 4 + 3 + 571 = 666.

It is not a de Polignac number, because 423745043571 - 2⁶ = 423745043507 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (423745043573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 60826986 + ... + 60833951.

Almost surely, 2^423745043571 is an apocalyptic number.

423745043571 is a deficient number, since it is larger than the sum of its proper divisors (223977790341).

423745043571 is a wasteful number, since it uses less digits than its factorization.

423745043571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121660992 (or 121660983 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 45.

The spelling of 423745043571 in words is "four hundred twenty-three billion, seven hundred forty-five million, forty-three thousand, five hundred seventy-one".