163663422615 has 256 divisors, whose sum is σ = 367234560000. Its totient is φ = 67182151680.

The previous prime is 163663422529. The next prime is 163663422661. The reversal of 163663422615 is 516224366361.

163663422615 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 6 + 3 + 4 + 22 + 615 = 666.

It is not a de Polignac number, because 163663422615 - 2⁷ = 163663422487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 468949461 + ... + 468949809.

It is an arithmetic number, because the mean of its divisors is an integer number (1434510000).

Almost surely, 2^163663422615 is an apocalyptic number.

163663422615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163663422615 is an abundant number, since it is smaller than the sum of its proper divisors (203571137385).

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

163663422615 is a wasteful number, since it uses less digits than its factorization.

163663422615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 801 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

Adding to 163663422615 its reverse (516224366361), we get a palindrome (679887788976).

The spelling of 163663422615 in words is "one hundred sixty-three billion, six hundred sixty-three million, four hundred twenty-two thousand, six hundred fifteen".