15612216623 has 2 divisors, whose sum is σ = 15612216624. Its totient is φ = 15612216622.

The previous prime is 15612216583. The next prime is 15612216709. The reversal of 15612216623 is 32661221651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15612216623 - 2¹⁴ = 15612200239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15612216223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7806108311 + 7806108312.

It is an arithmetic number, because the mean of its divisors is an integer number (7806108312).

Almost surely, 2^15612216623 is an apocalyptic number.

15612216623 is a deficient number, since it is larger than the sum of its proper divisors (1).

15612216623 is an equidigital number, since it uses as much as digits as its factorization.

15612216623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The spelling of 15612216623 in words is "fifteen billion, six hundred twelve million, two hundred sixteen thousand, six hundred twenty-three".