42745185561 has 8 divisors (see below), whose sum is σ = 61377702400. Its totient is φ = 26304729552.

The previous prime is 42745185529. The next prime is 42745185583. The reversal of 42745185561 is 16558154724.

It is a happy number.

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

It is not a de Polignac number, because 42745185561 - 2⁵ = 42745185529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42745185561.

It is not an unprimeable number, because it can be changed into a prime (42745185961) 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, 548015161 + ... + 548015238.

It is an arithmetic number, because the mean of its divisors is an integer number (7672212800).

Almost surely, 2^42745185561 is an apocalyptic number.

It is an amenable number.

42745185561 is a deficient number, since it is larger than the sum of its proper divisors (18632516839).

42745185561 is a wasteful number, since it uses less digits than its factorization.

42745185561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096030415.

The product of its digits is 1344000, while the sum is 48.

The spelling of 42745185561 in words is "forty-two billion, seven hundred forty-five million, one hundred eighty-five thousand, five hundred sixty-one".