904718661889 has 27 divisors (see below), whose sum is σ = 1118116856457. Its totient is φ = 729765759744.

The previous prime is 904718661827. The next prime is 904718661929. The reversal of 904718661889 is 988166817409.

The square root of 904718661889 is 951167.

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

It can be written as a sum of positive squares in 4 ways, for example, as 31690052289 + 873028609600 = 178017^2 + 934360^2 .

It is not a de Polignac number, because 904718661889 - 2¹⁵ = 904718629121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (904718661289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 113184877 + ... + 113192869.

Almost surely, 2^904718661889 is an apocalyptic number.

904718661889 is the 951167-th square number.

904718661889 is the 475584-th centered octagonal number.

It is an amenable number.

904718661889 is a deficient number, since it is larger than the sum of its proper divisors (213398194568).

904718661889 is an frugal number, since it uses more digits than its factorization.

904718661889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16034 (or 8017 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 67.

The spelling of 904718661889 in words is "nine hundred four billion, seven hundred eighteen million, six hundred sixty-one thousand, eight hundred eighty-nine".