64387801 has 6 divisors (see below), whose sum is σ = 66685502. Its totient is φ = 62166720.

The previous prime is 64387783. The next prime is 64387811. The reversal of 64387801 is 10878346.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10732176 + 53655625 = 3276^2 + 7325^2 .

It is not a de Polignac number, because 64387801 - 2⁵ = 64387769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64387811) 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 5 ways as a sum of consecutive naturals, for example, 37440 + ... + 39121.

Almost surely, 2^64387801 is an apocalyptic number.

It is an amenable number.

64387801 is a deficient number, since it is larger than the sum of its proper divisors (2297701).

64387801 is an equidigital number, since it uses as much as digits as its factorization.

64387801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76619 (or 76590 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 64387801 is about 8024.2009571047. The cubic root of 64387801 is about 400.8062923894.

The spelling of 64387801 in words is "sixty-four million, three hundred eighty-seven thousand, eight hundred one".