12005505465 has 32 divisors (see below), whose sum is σ = 19536356736. Its totient is φ = 6293890560.

The previous prime is 12005505461. The next prime is 12005505481. The reversal of 12005505465 is 56450550021.

It is not a de Polignac number, because 12005505465 - 2² = 12005505461 is a prime.

It is a super-2 number, since 2×12005505465² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12005505461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1851469 + ... + 1857941.

It is an arithmetic number, because the mean of its divisors is an integer number (610511148).

Almost surely, 2^12005505465 is an apocalyptic number.

12005505465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12005505465 is a deficient number, since it is larger than the sum of its proper divisors (7530851271).

12005505465 is a wasteful number, since it uses less digits than its factorization.

12005505465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8569.

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 12005505465 in words is "twelve billion, five million, five hundred five thousand, four hundred sixty-five".