64537988 has 12 divisors (see below), whose sum is σ = 113516172. Its totient is φ = 32104800.

The previous prime is 64537987. The next prime is 64538011. The reversal of 64537988 is 88973546.

It can be written as a sum of positive squares in 2 ways, for example, as 62853184 + 1684804 = 7928^2 + 1298^2 .

It is not an unprimeable number, because it can be changed into a prime (64537981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40163 + ... + 41738.

It is an arithmetic number, because the mean of its divisors is an integer number (9459681).

Almost surely, 2^64537988 is an apocalyptic number.

It is an amenable number.

64537988 is a deficient number, since it is larger than the sum of its proper divisors (48978184).

64537988 is a wasteful number, since it uses less digits than its factorization.

64537988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82102 (or 82100 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 64537988 is about 8033.5538835561. The cubic root of 64537988 is about 401.1176823897.

It can be divided in two parts, 6453 and 7988, that added together give a palindrome (14441).

The spelling of 64537988 in words is "sixty-four million, five hundred thirty-seven thousand, nine hundred eighty-eight".