123587800555 has 16 divisors (see below), whose sum is σ = 153432558720. Its totient is φ = 95452696192.

The previous prime is 123587800499. The next prime is 123587800579. The reversal of 123587800555 is 555008785321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123587800555 - 2¹⁷ = 123587669483 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123587800499 and 123587800508.

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, 2065317 + ... + 2124313.

It is an arithmetic number, because the mean of its divisors is an integer number (9589534920).

Almost surely, 2^123587800555 is an apocalyptic number.

123587800555 is a deficient number, since it is larger than the sum of its proper divisors (29844758165).

123587800555 is a wasteful number, since it uses less digits than its factorization.

123587800555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73478.

The product of its (nonzero) digits is 1680000, while the sum is 49.

The spelling of 123587800555 in words is "one hundred twenty-three billion, five hundred eighty-seven million, eight hundred thousand, five hundred fifty-five".