42165625645 has 48 divisors (see below), whose sum is σ = 63047617920. Its totient is φ = 26817056640.

The previous prime is 42165625631. The next prime is 42165625651. The reversal of 42165625645 is 54652656124.

It is not a de Polignac number, because 42165625645 - 2¹⁵ = 42165592877 is a prime.

It is a super-3 number, since 3×42165625645³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42165625595 and 42165625604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8352 + ... + 290518.

It is an arithmetic number, because the mean of its divisors is an integer number (1313492040).

Almost surely, 2^42165625645 is an apocalyptic number.

It is an amenable number.

42165625645 is a deficient number, since it is larger than the sum of its proper divisors (20881992275).

42165625645 is a wasteful number, since it uses less digits than its factorization.

42165625645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282226 (or 282215 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 46.

The spelling of 42165625645 in words is "forty-two billion, one hundred sixty-five million, six hundred twenty-five thousand, six hundred forty-five".