64681652 has 24 divisors (see below), whose sum is σ = 130514496. Its totient is φ = 27474048.

The previous prime is 64681627. The next prime is 64681657. The reversal of 64681652 is 25618646.

It is a super-2 number, since 2×64681652² = 8367432210898208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64681657) by changing a digit.

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, 7058 + ... + 13385.

It is an arithmetic number, because the mean of its divisors is an integer number (5438104).

Almost surely, 2^64681652 is an apocalyptic number.

It is an amenable number.

64681652 is an abundant number, since it is smaller than the sum of its proper divisors (65832844).

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

64681652 is a wasteful number, since it uses less digits than its factorization.

64681652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20567 (or 20565 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 64681652 is about 8042.4904103145. The cubic root of 64681652 is about 401.4150961867.

The spelling of 64681652 in words is "sixty-four million, six hundred eighty-one thousand, six hundred fifty-two".