1344644536545 has 24 divisors (see below), whose sum is σ = 2334090213312. Its totient is φ = 716105901600.

The previous prime is 1344644536519. The next prime is 1344644536559. The reversal of 1344644536545 is 5456354464431.

1344644536545 is a `hidden beast` number, since 1 + 3 + 4 + 4 + 6 + 44 + 53 + 6 + 545 = 666.

It is not a de Polignac number, because 1344644536545 - 2⁵ = 1344644536513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1344644536491 and 1344644536500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21590461 + ... + 21652650.

It is an arithmetic number, because the mean of its divisors is an integer number (97253758888).

Almost surely, 2^{1344644536545} is an apocalyptic number.

1344644536545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1344644536545 is a deficient number, since it is larger than the sum of its proper divisors (989445676767).

1344644536545 is a wasteful number, since it uses less digits than its factorization.

1344644536545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43243813 (or 43243810 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 54.

The spelling of 1344644536545 in words is "one trillion, three hundred forty-four billion, six hundred forty-four million, five hundred thirty-six thousand, five hundred forty-five".