123345677889 has 48 divisors (see below), whose sum is σ = 206744997888. Its totient is φ = 69401810016.

The previous prime is 123345677869. The next prime is 123345677941. The reversal of 123345677889 is 988776543321.

123345677889 is a `hidden beast` number, since 1 + 2 + 33 + 456 + 7 + 78 + 89 = 666.

It is not a de Polignac number, because 123345677889 - 2¹¹ = 123345675841 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123345677869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13363294 + ... + 13372520.

It is an arithmetic number, because the mean of its divisors is an integer number (4307187456).

Almost surely, 2^123345677889 is an apocalyptic number.

It is an amenable number.

123345677889 is a deficient number, since it is larger than the sum of its proper divisors (83399319999).

123345677889 is a wasteful number, since it uses less digits than its factorization.

123345677889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12474 (or 12471 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 123345677889 in words is "one hundred twenty-three billion, three hundred forty-five million, six hundred seventy-seven thousand, eight hundred eighty-nine".