623366320651 has 2 divisors, whose sum is σ = 623366320652. Its totient is φ = 623366320650.

The previous prime is 623366320583. The next prime is 623366320663. The reversal of 623366320651 is 156023663326.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623366320651 - 2¹⁵ = 623366287883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623366320598 and 623366320607.

It is not a weakly prime, because it can be changed into another prime (623366320051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311683160325 + 311683160326.

It is an arithmetic number, because the mean of its divisors is an integer number (311683160326).

Almost surely, 2^623366320651 is an apocalyptic number.

623366320651 is a deficient number, since it is larger than the sum of its proper divisors (1).

623366320651 is an equidigital number, since it uses as much as digits as its factorization.

623366320651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 43.

Adding to 623366320651 its reverse (156023663326), we get a palindrome (779389983977).

The spelling of 623366320651 in words is "six hundred twenty-three billion, three hundred sixty-six million, three hundred twenty thousand, six hundred fifty-one".