42004165501 has 4 divisors (see below), whose sum is σ = 42077987100. Its totient is φ = 41930343904.

The previous prime is 42004165487. The next prime is 42004165513. The reversal of 42004165501 is 10556140024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6964069401 + 35040096100 = 83451^2 + 187190^2 .

It is a cyclic number.

It is not a de Polignac number, because 42004165501 - 2²¹ = 42002068349 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 42004165501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004165561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36909946 + ... + 36911083.

It is an arithmetic number, because the mean of its divisors is an integer number (10519496775).

Almost surely, 2^42004165501 is an apocalyptic number.

It is an amenable number.

42004165501 is a deficient number, since it is larger than the sum of its proper divisors (73821599).

42004165501 is an equidigital number, since it uses as much as digits as its factorization.

42004165501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73821598.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 42004165501 in words is "forty-two billion, four million, one hundred sixty-five thousand, five hundred one".