64021652 has 6 divisors (see below), whose sum is σ = 112037898. Its totient is φ = 32010824.

The previous prime is 64021613. The next prime is 64021669. The reversal of 64021652 is 25612046.

It can be written as a sum of positive squares in only one way, i.e., 62948356 + 1073296 = 7934^2 + 1036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8002703 + ... + 8002710.

It is an arithmetic number, because the mean of its divisors is an integer number (18672983).

Almost surely, 2^64021652 is an apocalyptic number.

It is an amenable number.

64021652 is a deficient number, since it is larger than the sum of its proper divisors (48016246).

64021652 is a wasteful number, since it uses less digits than its factorization.

64021652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16005417 (or 16005415 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 64021652 is about 8001.3531355640. The cubic root of 64021652 is about 400.0451032474.

Adding to 64021652 its reverse (25612046), we get a palindrome (89633698).

It can be divided in two parts, 6402165 and 2, that multiplied together give a triangular number (12804330 = T₅₀₆₀).

The spelling of 64021652 in words is "sixty-four million, twenty-one thousand, six hundred fifty-two".