164785642 has 32 divisors (see below), whose sum is σ = 297239040. Its totient is φ = 67029120.

The previous prime is 164785633. The next prime is 164785657. The reversal of 164785642 is 246587461.

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, 17359 + ... + 25117.

It is an arithmetic number, because the mean of its divisors is an integer number (9288720).

Almost surely, 2^164785642 is an apocalyptic number.

164785642 is a deficient number, since it is larger than the sum of its proper divisors (132453398).

164785642 is a wasteful number, since it uses less digits than its factorization.

164785642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846.

The product of its digits is 322560, while the sum is 43.

The square root of 164785642 is about 12836.8859931060. The cubic root of 164785642 is about 548.2430347041.

The spelling of 164785642 in words is "one hundred sixty-four million, seven hundred eighty-five thousand, six hundred forty-two".