744675146621 has 4 divisors (see below), whose sum is σ = 851057310432. Its totient is φ = 638292982812.

The previous prime is 744675146617. The next prime is 744675146623. The reversal of 744675146621 is 126641576447.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126641576447 = 239 ⋅529881073.

It is a cyclic number.

It is not a de Polignac number, because 744675146621 - 2² = 744675146617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744675146623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53191081895 + ... + 53191081908.

It is an arithmetic number, because the mean of its divisors is an integer number (212764327608).

Almost surely, 2^744675146621 is an apocalyptic number.

It is an amenable number.

744675146621 is a deficient number, since it is larger than the sum of its proper divisors (106382163811).

744675146621 is a wasteful number, since it uses less digits than its factorization.

744675146621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106382163810.

The product of its digits is 6773760, while the sum is 53.

The spelling of 744675146621 in words is "seven hundred forty-four billion, six hundred seventy-five million, one hundred forty-six thousand, six hundred twenty-one".