42165475256 has 8 divisors (see below), whose sum is σ = 79060266120. Its totient is φ = 21082737624.

The previous prime is 42165475171. The next prime is 42165475271. The reversal of 42165475256 is 65257456124.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 42165475256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635342196 + ... + 2635342211.

It is an arithmetic number, because the mean of its divisors is an integer number (9882533265).

Almost surely, 2^42165475256 is an apocalyptic number.

It is an amenable number.

42165475256 is a deficient number, since it is larger than the sum of its proper divisors (36894790864).

42165475256 is a wasteful number, since it uses less digits than its factorization.

42165475256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270684413 (or 5270684409 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 47.

The spelling of 42165475256 in words is "forty-two billion, one hundred sixty-five million, four hundred seventy-five thousand, two hundred fifty-six".