64842637 has 8 divisors (see below), whose sum is σ = 67218840. Its totient is φ = 62475840.

The previous prime is 64842619. The next prime is 64842697. The reversal of 64842637 is 73624846.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13734436 + 51108201 = 3706^2 + 7149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64842637 - 2⁷ = 64842509 is a prime.

It is a super-2 number, since 2×64842637² = 8409135146227538, which contains 22 as substring.

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 64842637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64842697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13623 + ... + 17755.

It is an arithmetic number, because the mean of its divisors is an integer number (8402355).

Almost surely, 2^64842637 is an apocalyptic number.

It is an amenable number.

64842637 is a deficient number, since it is larger than the sum of its proper divisors (2376203).

64842637 is a wasteful number, since it uses less digits than its factorization.

64842637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703.

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

The square root of 64842637 is about 8052.4925954638. The cubic root of 64842637 is about 401.7478452186.

The spelling of 64842637 in words is "sixty-four million, eight hundred forty-two thousand, six hundred thirty-seven".