123454553445 has 24 divisors (see below), whose sum is σ = 215527384800. Its totient is φ = 65368738656.

The previous prime is 123454553423. The next prime is 123454553447. The reversal of 123454553445 is 544355454321.

123454553445 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 54 + 553 + 4 + 45 = 666.

It is not a de Polignac number, because 123454553445 - 2⁷ = 123454553317 is a prime.

It is a super-2 number, since 2×123454553445² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 123454553445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123454553447) 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, 9862215 + ... + 9874724.

It is an arithmetic number, because the mean of its divisors is an integer number (8980307700).

Almost surely, 2^123454553445 is an apocalyptic number.

123454553445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123454553445 is a deficient number, since it is larger than the sum of its proper divisors (92072831355).

123454553445 is a wasteful number, since it uses less digits than its factorization.

123454553445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19737089 (or 19737086 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 45.

The spelling of 123454553445 in words is "one hundred twenty-three billion, four hundred fifty-four million, five hundred fifty-three thousand, four hundred forty-five".