42918165889 has 9 divisors (see below), whose sum is σ = 43157943363. Its totient is φ = 42679716672.

The previous prime is 42918165877. The next prime is 42918165893. The reversal of 42918165889 is 98856181924.

The square root of 42918165889 is 207167.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 827540289 + 42090625600 = 28767^2 + 205160^2 .

It is not a de Polignac number, because 42918165889 - 2¹⁵ = 42918133121 is a prime.

It is a Duffinian number.

Its product of digits (9953280) is a multiple of the sum of its prime divisors (1152).

It is not an unprimeable number, because it can be changed into a prime (42918165809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 46197777 + ... + 46198705.

Almost surely, 2^42918165889 is an apocalyptic number.

42918165889 is the 207167-th square number.

42918165889 is the 103584-th centered octagonal number.

It is an amenable number.

42918165889 is a deficient number, since it is larger than the sum of its proper divisors (239777474).

42918165889 is an frugal number, since it uses more digits than its factorization.

42918165889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304 (or 1152 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 61.

The spelling of 42918165889 in words is "forty-two billion, nine hundred eighteen million, one hundred sixty-five thousand, eight hundred eighty-nine".