123445556667 has 24 divisors (see below), whose sum is σ = 179625208464. Its totient is φ = 81691182144.

The previous prime is 123445556651. The next prime is 123445556669. The reversal of 123445556667 is 766655544321.

It is not a de Polignac number, because 123445556667 - 2⁴ = 123445556651 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123445556669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1388248 + ... + 1474490.

It is an arithmetic number, because the mean of its divisors is an integer number (7484383686).

Almost surely, 2^123445556667 is an apocalyptic number.

123445556667 is a deficient number, since it is larger than the sum of its proper divisors (56179651797).

123445556667 is a wasteful number, since it uses less digits than its factorization.

123445556667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87419 (or 87416 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 54.

The spelling of 123445556667 in words is "one hundred twenty-three billion, four hundred forty-five million, five hundred fifty-six thousand, six hundred sixty-seven".