16427501663 has 4 divisors (see below), whose sum is σ = 16428956208. Its totient is φ = 16426047120.

The previous prime is 16427501653. The next prime is 16427501683. The reversal of 16427501663 is 36610572461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36610572461 = 7681 ⋅4766381.

It is a cyclic number.

It is not a de Polignac number, because 16427501663 - 2⁶ = 16427501599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16427501663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16427501653) 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, 710198 + ... + 732963.

It is an arithmetic number, because the mean of its divisors is an integer number (4107239052).

Almost surely, 2^16427501663 is an apocalyptic number.

16427501663 is a deficient number, since it is larger than the sum of its proper divisors (1454545).

16427501663 is a wasteful number, since it uses less digits than its factorization.

16427501663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454544.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 16427501663 in words is "sixteen billion, four hundred twenty-seven million, five hundred one thousand, six hundred sixty-three".