64181634 has 32 divisors (see below), whose sum is σ = 140348160. Its totient is φ = 19405200.

The previous prime is 64181633. The next prime is 64181641. The reversal of 64181634 is 43618146.

64181634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 64181595 and 64181604.

It is not an unprimeable number, because it can be changed into a prime (64181633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40069 + ... + 41639.

It is an arithmetic number, because the mean of its divisors is an integer number (4385880).

Almost surely, 2^64181634 is an apocalyptic number.

64181634 is an abundant number, since it is smaller than the sum of its proper divisors (76166526).

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

64181634 is a wasteful number, since it uses less digits than its factorization.

64181634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206.

The product of its digits is 13824, while the sum is 33.

The square root of 64181634 is about 8011.3440819877. The cubic root of 64181634 is about 400.3780467557.

The spelling of 64181634 in words is "sixty-four million, one hundred eighty-one thousand, six hundred thirty-four".