123533013555 has 48 divisors (see below), whose sum is σ = 244740038400. Its totient is φ = 56465999424.

The previous prime is 123533013521. The next prime is 123533013601. The reversal of 123533013555 is 555310335321.

123533013555 is a `hidden beast` number, since 1 + 23 + 53 + 30 + 1 + 3 + 555 = 666.

It is not a de Polignac number, because 123533013555 - 2¹⁰ = 123533012531 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4047984 + ... + 4078386.

It is an arithmetic number, because the mean of its divisors is an integer number (5098750800).

Almost surely, 2^123533013555 is an apocalyptic number.

123533013555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123533013555 is a deficient number, since it is larger than the sum of its proper divisors (121207024845).

123533013555 is a wasteful number, since it uses less digits than its factorization.

123533013555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43320 (or 43317 counting only the distinct ones).

The product of its (nonzero) digits is 101250, while the sum is 36.

Adding to 123533013555 its reverse (555310335321), we get a palindrome (678843348876).

The spelling of 123533013555 in words is "one hundred twenty-three billion, five hundred thirty-three million, thirteen thousand, five hundred fifty-five".