163652081569 has 4 divisors (see below), whose sum is σ = 172265349040. Its totient is φ = 155038814100.

The previous prime is 163652081533. The next prime is 163652081573. The reversal of 163652081569 is 965180256361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163652081569 - 2⁷ = 163652081441 is a prime.

It is a super-2 number, since 2×163652081569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163652021569) 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, 4306633707 + ... + 4306633744.

It is an arithmetic number, because the mean of its divisors is an integer number (43066337260).

Almost surely, 2^163652081569 is an apocalyptic number.

163652081569 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

163652081569 is a deficient number, since it is larger than the sum of its proper divisors (8613267471).

163652081569 is an equidigital number, since it uses as much as digits as its factorization.

163652081569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8613267470.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 163652081569 in words is "one hundred sixty-three billion, six hundred fifty-two million, eighty-one thousand, five hundred sixty-nine".