12081154564 has 12 divisors (see below), whose sum is σ = 21431637724. Its totient is φ = 5957829504.

The previous prime is 12081154537. The next prime is 12081154571. The reversal of 12081154564 is 46545118021.

It can be written as a sum of positive squares in 2 ways, for example, as 4268008900 + 7813145664 = 65330^2 + 88392^2 .

It is a super-4 number, since 4×12081154564⁴ (a number of 41 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20686617 + ... + 20687200.

Almost surely, 2^12081154564 is an apocalyptic number.

It is an amenable number.

12081154564 is a deficient number, since it is larger than the sum of its proper divisors (9350483160).

12081154564 is a wasteful number, since it uses less digits than its factorization.

12081154564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41373894 (or 41373892 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 12081154564 in words is "twelve billion, eighty-one million, one hundred fifty-four thousand, five hundred sixty-four".