123531555401052 has 48 divisors (see below), whose sum is σ = 291112493807520. Its totient is φ = 40767462819072.

The previous prime is 123531555401017. The next prime is 123531555401147. The reversal of 123531555401052 is 250104555135321.

It is a junction number, because it is equal to n+sod(n) for n = 123531555400995 and 123531555401013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35308183 + ... + 38648814.

It is an arithmetic number, because the mean of its divisors is an integer number (6064843620990).

Almost surely, 2^{123531555401052} is an apocalyptic number.

123531555401052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123531555401052 is an abundant number, since it is smaller than the sum of its proper divisors (167580938406468).

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

123531555401052 is a wasteful number, since it uses less digits than its factorization.

123531555401052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73958390 (or 73958388 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 123531555401052 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, five hundred fifty-five million, four hundred one thousand, fifty-two".