12123877536 has 36 divisors (see below), whose sum is σ = 34477277562. Its totient is φ = 4041292416.

The previous prime is 12123877531. The next prime is 12123877567. The reversal of 12123877536 is 63577832121.

12123877536 is a `hidden beast` number, since 1 + 2 + 12 + 38 + 77 + 536 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11885360400 + 238517136 = 109020^2 + 15444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 12123877491 and 12123877500.

It is not an unprimeable number, because it can be changed into a prime (12123877531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21048111 + ... + 21048686.

Almost surely, 2^12123877536 is an apocalyptic number.

12123877536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12123877536 is an abundant number, since it is smaller than the sum of its proper divisors (22353400026).

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

12123877536 is a wasteful number, since it uses less digits than its factorization.

12123877536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42096813 (or 42096802 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 12123877536 in words is "twelve billion, one hundred twenty-three million, eight hundred seventy-seven thousand, five hundred thirty-six".