15606555620223 has 4 divisors (see below), whose sum is σ = 20808740826968. Its totient is φ = 10404370413480.

The previous prime is 15606555620203. The next prime is 15606555620287. The reversal of 15606555620223 is 32202655560651.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15606555620223 - 2¹⁰ = 15606555619199 is a prime.

It is a super-2 number, since 2×15606555620223² (a number of 27 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 (15606555620203) 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, 2601092603368 + ... + 2601092603373.

It is an arithmetic number, because the mean of its divisors is an integer number (5202185206742).

Almost surely, 2^{15606555620223} is an apocalyptic number.

15606555620223 is a deficient number, since it is larger than the sum of its proper divisors (5202185206745).

15606555620223 is an equidigital number, since it uses as much as digits as its factorization.

15606555620223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202185206744.

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 15606555620223 in words is "fifteen trillion, six hundred six billion, five hundred fifty-five million, six hundred twenty thousand, two hundred twenty-three".