12045155505 has 32 divisors (see below), whose sum is σ = 19777322880. Its totient is φ = 6257472000.

The previous prime is 12045155489. The next prime is 12045155513. The reversal of 12045155505 is 50555154021.

It is not a de Polignac number, because 12045155505 - 2⁴ = 12045155489 is a prime.

It is a super-2 number, since 2×12045155505² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56005 + ... + 165005.

It is an arithmetic number, because the mean of its divisors is an integer number (618041340).

Almost surely, 2^12045155505 is an apocalyptic number.

12045155505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12045155505 is a deficient number, since it is larger than the sum of its proper divisors (7732167375).

12045155505 is a wasteful number, since it uses less digits than its factorization.

12045155505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109201.

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 12045155505 in words is "twelve billion, forty-five million, one hundred fifty-five thousand, five hundred five".