163507645 has 8 divisors (see below), whose sum is σ = 224239104. Its totient is φ = 112119504.

The previous prime is 163507637. The next prime is 163507681. The reversal of 163507645 is 546705361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163507645 - 2³ = 163507637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2335789 + ... + 2335858.

It is an arithmetic number, because the mean of its divisors is an integer number (28029888).

Almost surely, 2^163507645 is an apocalyptic number.

It is an amenable number.

163507645 is a deficient number, since it is larger than the sum of its proper divisors (60731459).

163507645 is an equidigital number, since it uses as much as digits as its factorization.

163507645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671659.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 163507645 is about 12787.0107922063. The cubic root of 163507645 is about 546.8220530835.

The spelling of 163507645 in words is "one hundred sixty-three million, five hundred seven thousand, six hundred forty-five".