989752257989 has 8 divisors (see below), whose sum is σ = 1085210599968. Its totient is φ = 895207393360.

The previous prime is 989752257979. The next prime is 989752258031.

It is a happy number.

989752257989 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989752257989 - 2²⁸ = 989483822533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989752257929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228367067 + ... + 228371400.

It is an arithmetic number, because the mean of its divisors is an integer number (135651324996).

Almost surely, 2^989752257989 is an apocalyptic number.

It is an amenable number.

989752257989 is a deficient number, since it is larger than the sum of its proper divisors (95458341979).

989752257989 is a wasteful number, since it uses less digits than its factorization.

989752257989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456738675.

The product of its digits is 2057529600, while the sum is 80.

The spelling of 989752257989 in words is "nine hundred eighty-nine billion, seven hundred fifty-two million, two hundred fifty-seven thousand, nine hundred eighty-nine".