123537349836 has 18 divisors (see below), whose sum is σ = 312274967732. Its totient is φ = 41179116600.

The previous prime is 123537349811. The next prime is 123537349889. The reversal of 123537349836 is 638943735321.

123537349836 is a `hidden beast` number, since 1 + 2 + 3 + 53 + 73 + 498 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×123537349836² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1715796490 + ... + 1715796561.

Almost surely, 2^123537349836 is an apocalyptic number.

It is an amenable number.

123537349836 is an abundant number, since it is smaller than the sum of its proper divisors (188737617896).

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

123537349836 is a wasteful number, since it uses less digits than its factorization.

123537349836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431593061 (or 3431593056 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The spelling of 123537349836 in words is "one hundred twenty-three billion, five hundred thirty-seven million, three hundred forty-nine thousand, eight hundred thirty-six".