123815185450 has 24 divisors (see below), whose sum is σ = 251232268320. Its totient is φ = 45023703600.

The previous prime is 123815185427. The next prime is 123815185469. The reversal of 123815185450 is 54581518321.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 123815185397 and 123815185406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112558710 + ... + 112559809.

It is an arithmetic number, because the mean of its divisors is an integer number (10468011180).

Almost surely, 2^123815185450 is an apocalyptic number.

123815185450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123815185450 is an abundant number, since it is smaller than the sum of its proper divisors (127417082870).

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

123815185450 is a wasteful number, since it uses less digits than its factorization.

123815185450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225118542 (or 225118537 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 43.

The spelling of 123815185450 in words is "one hundred twenty-three billion, eight hundred fifteen million, one hundred eighty-five thousand, four hundred fifty".