989446655401 has 2 divisors, whose sum is σ = 989446655402. Its totient is φ = 989446655400.

The previous prime is 989446655369. The next prime is 989446655441. The reversal of 989446655401 is 104556644989.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728709786025 + 260736869376 = 853645^2 + 510624^2 .

It is a cyclic number.

It is not a de Polignac number, because 989446655401 - 2⁵ = 989446655369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 989446655401.

It is not a weakly prime, because it can be changed into another prime (989446655441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494723327700 + 494723327701.

It is an arithmetic number, because the mean of its divisors is an integer number (494723327701).

Almost surely, 2^989446655401 is an apocalyptic number.

It is an amenable number.

989446655401 is a deficient number, since it is larger than the sum of its proper divisors (1).

989446655401 is an equidigital number, since it uses as much as digits as its factorization.

989446655401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37324800, while the sum is 61.

The spelling of 989446655401 in words is "nine hundred eighty-nine billion, four hundred forty-six million, six hundred fifty-five thousand, four hundred one".