42990165123 has 16 divisors (see below), whose sum is σ = 60415593120. Its totient is φ = 27149717504.

The previous prime is 42990165079. The next prime is 42990165137. The reversal of 42990165123 is 32156109924.

It is a cyclic number.

It is not a de Polignac number, because 42990165123 - 2¹⁴ = 42990148739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42990165173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4657086 + ... + 4666307.

It is an arithmetic number, because the mean of its divisors is an integer number (3775974570).

Almost surely, 2^42990165123 is an apocalyptic number.

42990165123 is a deficient number, since it is larger than the sum of its proper divisors (17425427997).

42990165123 is a wasteful number, since it uses less digits than its factorization.

42990165123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9323478.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 42990165123 in words is "forty-two billion, nine hundred ninety million, one hundred sixty-five thousand, one hundred twenty-three".