15663112606 has 4 divisors (see below), whose sum is σ = 23494668912. Its totient is φ = 7831556302.

The previous prime is 15663112601. The next prime is 15663112613. The reversal of 15663112606 is 60621136651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60621136651 = 97039 ⋅624709.

It is a super-2 number, since 2×15663112606² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15663112601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3915778150 + ... + 3915778153.

It is an arithmetic number, because the mean of its divisors is an integer number (5873667228).

Almost surely, 2^15663112606 is an apocalyptic number.

15663112606 is a deficient number, since it is larger than the sum of its proper divisors (7831556306).

15663112606 is an equidigital number, since it uses as much as digits as its factorization.

15663112606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831556305.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 15663112606 in words is "fifteen billion, six hundred sixty-three million, one hundred twelve thousand, six hundred six".