64238537 has 6 divisors (see below), whose sum is σ = 70609434. Its totient is φ = 58398560.

The previous prime is 64238507. The next prime is 64238543. The reversal of 64238537 is 73583246.

It can be written as a sum of positive squares in only one way, i.e., 54479161 + 9759376 = 7381^2 + 3124^2 .

It is not a de Polignac number, because 64238537 - 2²² = 60044233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64238537.

It is not an unprimeable number, because it can be changed into a prime (64238507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 265328 + ... + 265569.

It is an arithmetic number, because the mean of its divisors is an integer number (11768239).

Almost surely, 2^64238537 is an apocalyptic number.

It is an amenable number.

64238537 is a deficient number, since it is larger than the sum of its proper divisors (6370897).

64238537 is a wasteful number, since it uses less digits than its factorization.

64238537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530919 (or 530908 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 64238537 is about 8014.8946967505. The cubic root of 64238537 is about 400.4963359551.

The spelling of 64238537 in words is "sixty-four million, two hundred thirty-eight thousand, five hundred thirty-seven".