744487784431 has 2 divisors, whose sum is σ = 744487784432. Its totient is φ = 744487784430.

The previous prime is 744487784429. The next prime is 744487784471. The reversal of 744487784431 is 134487784447.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 744487784431 - 2¹ = 744487784429 is a prime.

It is a super-2 number, since 2×744487784431² (a number of 25 digits) contains 22 as substring.

Together with 744487784429, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 744487784431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744487784471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372243892215 + 372243892216.

It is an arithmetic number, because the mean of its divisors is an integer number (372243892216).

Almost surely, 2^744487784431 is an apocalyptic number.

744487784431 is a deficient number, since it is larger than the sum of its proper divisors (1).

744487784431 is an equidigital number, since it uses as much as digits as its factorization.

744487784431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67436544, while the sum is 61.

The spelling of 744487784431 in words is "seven hundred forty-four billion, four hundred eighty-seven million, seven hundred eighty-four thousand, four hundred thirty-one".