163816387572 has 12 divisors (see below), whose sum is σ = 382238237696. Its totient is φ = 54605462520.

The previous prime is 163816387571. The next prime is 163816387573. The reversal of 163816387572 is 275783618361.

It is an interprime number because it is at equal distance from previous prime (163816387571) and next prime (163816387573).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163816387571) 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, 6825682804 + ... + 6825682827.

Almost surely, 2^163816387572 is an apocalyptic number.

163816387572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

163816387572 is an abundant number, since it is smaller than the sum of its proper divisors (218421850124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163816387572 is a wasteful number, since it uses less digits than its factorization.

163816387572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13651365638 (or 13651365636 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 57.

The spelling of 163816387572 in words is "one hundred sixty-three billion, eight hundred sixteen million, three hundred eighty-seven thousand, five hundred seventy-two".