744325136561 has 4 divisors (see below), whose sum is σ = 744338463552. Its totient is φ = 744311809572.

The previous prime is 744325136417. The next prime is 744325136563. The reversal of 744325136561 is 165631523447.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 744325136561 - 2²⁶ = 744258027697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744325136563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6579365 + ... + 6691538.

It is an arithmetic number, because the mean of its divisors is an integer number (186084615888).

Almost surely, 2^744325136561 is an apocalyptic number.

It is an amenable number.

744325136561 is a deficient number, since it is larger than the sum of its proper divisors (13326991).

744325136561 is a wasteful number, since it uses less digits than its factorization.

744325136561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13326990.

The product of its digits is 1814400, while the sum is 47.

The spelling of 744325136561 in words is "seven hundred forty-four billion, three hundred twenty-five million, one hundred thirty-six thousand, five hundred sixty-one".