623063626621 has 4 divisors (see below), whose sum is σ = 624287720700. Its totient is φ = 621839532544.

The previous prime is 623063626547. The next prime is 623063626663. The reversal of 623063626621 is 126626360326.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126626360326 = 2 ⋅63313180163.

It can be written as a sum of positive squares in 2 ways, for example, as 358697979396 + 264365647225 = 598914^2 + 514165^2 .

It is a cyclic number.

It is not a de Polignac number, because 623063626621 - 2⁹ = 623063626109 is a prime.

It is a super-2 number, since 2×623063626621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623063626021) 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, 612046276 + ... + 612047293.

It is an arithmetic number, because the mean of its divisors is an integer number (156071930175).

Almost surely, 2^623063626621 is an apocalyptic number.

It is an amenable number.

623063626621 is a deficient number, since it is larger than the sum of its proper divisors (1224094079).

623063626621 is a wasteful number, since it uses less digits than its factorization.

623063626621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224094078.

The product of its (nonzero) digits is 559872, while the sum is 43.

Adding to 623063626621 its reverse (126626360326), we get a palindrome (749689986947).

The spelling of 623063626621 in words is "six hundred twenty-three billion, sixty-three million, six hundred twenty-six thousand, six hundred twenty-one".