123455567889 has 6 divisors (see below), whose sum is σ = 178324709186. Its totient is φ = 82303711920.

The previous prime is 123455567869. The next prime is 123455567891. The reversal of 123455567889 is 988765554321.

123455567889 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 5 + 556 + 78 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 78951446289 + 44504121600 = 280983^2 + 210960^2 .

It is not a de Polignac number, because 123455567889 - 2⁵ = 123455567857 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123455567869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6858642652 + ... + 6858642669.

Almost surely, 2^123455567889 is an apocalyptic number.

It is an amenable number.

123455567889 is a deficient number, since it is larger than the sum of its proper divisors (54869141297).

123455567889 is a wasteful number, since it uses less digits than its factorization.

123455567889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13717285327 (or 13717285324 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 123455567889 in words is "one hundred twenty-three billion, four hundred fifty-five million, five hundred sixty-seven thousand, eight hundred eighty-nine".