163071645 has 16 divisors (see below), whose sum is σ = 284634432. Its totient is φ = 79064960.

The previous prime is 163071607. The next prime is 163071673. The reversal of 163071645 is 546170361.

163071645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163071645 - 2⁶ = 163071581 is a prime.

It is a super-2 number, since 2×163071645² = 53184722806012050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493992 + ... + 494321.

It is an arithmetic number, because the mean of its divisors is an integer number (17789652).

Almost surely, 2^163071645 is an apocalyptic number.

163071645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163071645 is a deficient number, since it is larger than the sum of its proper divisors (121562787).

163071645 is a wasteful number, since it uses less digits than its factorization.

163071645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988332.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 163071645 is about 12769.9508612993. The cubic root of 163071645 is about 546.3355791052.

The spelling of 163071645 in words is "one hundred sixty-three million, seventy-one thousand, six hundred forty-five".