623163411649 has 3 divisors (see below), whose sum is σ = 623164201057. Its totient is φ = 623162622242.

The previous prime is 623163411583. The next prime is 623163411667. The reversal of 623163411649 is 946114361326.

The square root of 623163411649 is 789407.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 946114361326 = 2 ⋅473057180663.

It is not a de Polignac number, because 623163411649 - 2⁹ = 623163411137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623163411599 and 623163411608.

It is not an unprimeable number, because it can be changed into a prime (693163411649) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 394704 + ... + 1184110.

Almost surely, 2^623163411649 is an apocalyptic number.

623163411649 is the 789407-th square number.

623163411649 is the 394704-th centered octagonal number.

It is an amenable number.

623163411649 is a deficient number, since it is larger than the sum of its proper divisors (789408).

623163411649 is an frugal number, since it uses more digits than its factorization.

623163411649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578814 (or 789407 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The spelling of 623163411649 in words is "six hundred twenty-three billion, one hundred sixty-three million, four hundred eleven thousand, six hundred forty-nine".