64248637 has 6 divisors (see below), whose sum is σ = 67164062. Its totient is φ = 61454712.

The previous prime is 64248631. The next prime is 64248673. The reversal of 64248637 is 73684246.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61873956 + 2374681 = 7866^2 + 1541^2 .

It is not a de Polignac number, because 64248637 - 2¹⁵ = 64215869 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 64248637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64248631) 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, 60198 + ... + 61255.

Almost surely, 2^64248637 is an apocalyptic number.

It is an amenable number.

64248637 is a deficient number, since it is larger than the sum of its proper divisors (2915425).

64248637 is a wasteful number, since it uses less digits than its factorization.

64248637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121499 (or 121476 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 64248637 is about 8015.5247488858. The cubic root of 64248637 is about 400.5173244002.

The spelling of 64248637 in words is "sixty-four million, two hundred forty-eight thousand, six hundred thirty-seven".