123503154912 has 72 divisors (see below), whose sum is σ = 369696960360. Its totient is φ = 39000994560.

The previous prime is 123503154889. The next prime is 123503154913. The reversal of 123503154912 is 219451305321.

It is a happy number.

123503154912 is a `hidden beast` number, since 1 + 23 + 50 + 31 + 549 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123503154913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11279539 + ... + 11290482.

It is an arithmetic number, because the mean of its divisors is an integer number (5134680005).

Almost surely, 2^123503154912 is an apocalyptic number.

123503154912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123503154912 is an abundant number, since it is smaller than the sum of its proper divisors (246193805448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123503154912 is a wasteful number, since it uses less digits than its factorization.

123503154912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22570056 (or 22570045 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 123503154912 in words is "one hundred twenty-three billion, five hundred three million, one hundred fifty-four thousand, nine hundred twelve".