64681752 has 16 divisors (see below), whose sum is σ = 161704440. Its totient is φ = 21560576.

The previous prime is 64681741. The next prime is 64681789. The reversal of 64681752 is 25718646.

It is a self number, because there is not a number n which added to its sum of digits gives 64681752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347513 + ... + 1347560.

Almost surely, 2^64681752 is an apocalyptic number.

It is an amenable number.

64681752 is an abundant number, since it is smaller than the sum of its proper divisors (97022688).

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

64681752 is a wasteful number, since it uses less digits than its factorization.

64681752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695082 (or 2695078 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 64681752 is about 8042.4966272918. The cubic root of 64681752 is about 401.4153030536.

The spelling of 64681752 in words is "sixty-four million, six hundred eighty-one thousand, seven hundred fifty-two".