64511992 has 32 divisors (see below), whose sum is σ = 131443200. Its totient is φ = 29570400.

The previous prime is 64511963. The next prime is 64512001. The reversal of 64511992 is 29911546.

It is a super-2 number, since 2×64511992² = 8323594223616128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2134 + ... + 11557.

It is an arithmetic number, because the mean of its divisors is an integer number (4107600).

Almost surely, 2^64511992 is an apocalyptic number.

64511992 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

64511992 is an abundant number, since it is smaller than the sum of its proper divisors (66931208).

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

64511992 is a wasteful number, since it uses less digits than its factorization.

64511992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13747 (or 13743 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 64511992 is about 8031.9357567152. The cubic root of 64511992 is about 401.0638182188.

The spelling of 64511992 in words is "sixty-four million, five hundred eleven thousand, nine hundred ninety-two".