12445540065 has 48 divisors (see below), whose sum is σ = 24698164608. Its totient is φ = 5679203328.

The previous prime is 12445540061. The next prime is 12445540091. The reversal of 12445540065 is 56004554421.

12445540065 is a `hidden beast` number, since 1 + 2 + 44 + 554 + 0 + 0 + 65 = 666.

It is not a de Polignac number, because 12445540065 - 2² = 12445540061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12445540061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142257 + ... + 212433.

It is an arithmetic number, because the mean of its divisors is an integer number (514545096).

Almost surely, 2^12445540065 is an apocalyptic number.

12445540065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12445540065 is a deficient number, since it is larger than the sum of its proper divisors (12252624543).

12445540065 is a wasteful number, since it uses less digits than its factorization.

12445540065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70758 (or 70755 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 12445540065 in words is "twelve billion, four hundred forty-five million, five hundred forty thousand, sixty-five".