164745642 has 32 divisors (see below), whose sum is σ = 351825408. Its totient is φ = 51304176.

The previous prime is 164745629. The next prime is 164745649. The reversal of 164745642 is 246547461.

164745642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×164745642² = 54282253115984328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164745642.

It is not an unprimeable number, because it can be changed into a prime (164745649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7948 + ... + 19815.

It is an arithmetic number, because the mean of its divisors is an integer number (10994544).

Almost surely, 2^164745642 is an apocalyptic number.

164745642 is an abundant number, since it is smaller than the sum of its proper divisors (187079766).

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

164745642 is a wasteful number, since it uses less digits than its factorization.

164745642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27834.

The product of its digits is 161280, while the sum is 39.

The square root of 164745642 is about 12835.3278882933. The cubic root of 164745642 is about 548.1986710169.

The spelling of 164745642 in words is "one hundred sixty-four million, seven hundred forty-five thousand, six hundred forty-two".