123481133478 has 20 divisors (see below), whose sum is σ = 276689206860. Its totient is φ = 41160377772.

The previous prime is 123481133449. The next prime is 123481133491. The reversal of 123481133478 is 874331184321.

123481133478 is a `hidden beast` number, since 1 + 2 + 3 + 48 + 1 + 133 + 478 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 381114448 + ... + 381114771.

It is an arithmetic number, because the mean of its divisors is an integer number (13834460343).

Almost surely, 2^123481133478 is an apocalyptic number.

123481133478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123481133478 is an abundant number, since it is smaller than the sum of its proper divisors (153208073382).

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

123481133478 is an equidigital number, since it uses as much as digits as its factorization.

123481133478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762229233 (or 762229224 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 123481133478 in words is "one hundred twenty-three billion, four hundred eighty-one million, one hundred thirty-three thousand, four hundred seventy-eight".