64689652 has 24 divisors (see below), whose sum is σ = 114670080. Its totient is φ = 31930080.

The previous prime is 64689649. The next prime is 64689659. The reversal of 64689652 is 25698646.

It is a super-2 number, since 2×64689652² = 8369502151762208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64689659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149877 + ... + 150307.

It is an arithmetic number, because the mean of its divisors is an integer number (4777920).

Almost surely, 2^64689652 is an apocalyptic number.

It is an amenable number.

64689652 is a deficient number, since it is larger than the sum of its proper divisors (49980428).

64689652 is a wasteful number, since it uses less digits than its factorization.

64689652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 829 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The square root of 64689652 is about 8042.9877533165. The cubic root of 64689652 is about 401.4316448693.

It can be divided in two parts, 64689 and 652, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 64689652 in words is "sixty-four million, six hundred eighty-nine thousand, six hundred fifty-two".