64191492 has 36 divisors (see below), whose sum is σ = 162782256. Its totient is φ = 21328560.

The previous prime is 64191433. The next prime is 64191497. The reversal of 64191492 is 29419146.

It is a happy number.

64191492 is a `hidden beast` number, since 641 + 9 + 1 + 4 + 9 + 2 = 666.

64191492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64191497) 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 11 ways as a sum of consecutive naturals, for example, 9223 + ... + 14609.

Almost surely, 2^64191492 is an apocalyptic number.

It is an amenable number.

64191492 is an abundant number, since it is smaller than the sum of its proper divisors (98590764).

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

64191492 is a wasteful number, since it uses less digits than its factorization.

64191492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728 (or 5723 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 64191492 is about 8011.9593109301. The cubic root of 64191492 is about 400.3985444406.

The spelling of 64191492 in words is "sixty-four million, one hundred ninety-one thousand, four hundred ninety-two".