744359921871 has 4 divisors (see below), whose sum is σ = 992479895832. Its totient is φ = 496239947912.

The previous prime is 744359921863. The next prime is 744359921891. The reversal of 744359921871 is 178129953447.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 744359921871 - 2³ = 744359921863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744359921861) 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, 124059986976 + ... + 124059986981.

It is an arithmetic number, because the mean of its divisors is an integer number (248119973958).

Almost surely, 2^744359921871 is an apocalyptic number.

744359921871 is a deficient number, since it is larger than the sum of its proper divisors (248119973961).

744359921871 is a wasteful number, since it uses less digits than its factorization.

744359921871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248119973960.

The product of its digits is 15240960, while the sum is 60.

The spelling of 744359921871 in words is "seven hundred forty-four billion, three hundred fifty-nine million, nine hundred twenty-one thousand, eight hundred seventy-one".