889948686850009 has 2 divisors, whose sum is σ = 889948686850010. Its totient is φ = 889948686850008.

The previous prime is 889948686849979. The next prime is 889948686850057. The reversal of 889948686850009 is 900058686849988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519096302179225 + 370852384670784 = 22783685^2 + 19257528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889948686850009 is a prime.

It is not a weakly prime, because it can be changed into another prime (889948686850099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444974343425004 + 444974343425005.

It is an arithmetic number, because the mean of its divisors is an integer number (444974343425005).

Almost surely, 2^{889948686850009} is an apocalyptic number.

It is an amenable number.

889948686850009 is a deficient number, since it is larger than the sum of its proper divisors (1).

889948686850009 is an equidigital number, since it uses as much as digits as its factorization.

889948686850009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17199267840, while the sum is 88.

The spelling of 889948686850009 in words is "eight hundred eighty-nine trillion, nine hundred forty-eight billion, six hundred eighty-six million, eight hundred fifty thousand, nine".