64912801 has 4 divisors (see below), whose sum is σ = 65555604. Its totient is φ = 64270000.

The previous prime is 64912777. The next prime is 64912807. The reversal of 64912801 is 10821946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10821946 = 2 ⋅5410973.

It can be written as a sum of positive squares in 2 ways, for example, as 30514576 + 34398225 = 5524^2 + 5865^2 .

It is a cyclic number.

It is not a de Polignac number, because 64912801 - 2¹¹ = 64910753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64912807) 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 3 ways as a sum of consecutive naturals, for example, 321250 + ... + 321451.

It is an arithmetic number, because the mean of its divisors is an integer number (16388901).

Almost surely, 2^64912801 is an apocalyptic number.

It is an amenable number.

64912801 is a deficient number, since it is larger than the sum of its proper divisors (642803).

64912801 is a wasteful number, since it uses less digits than its factorization.

64912801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642802.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 64912801 is about 8056.8480809806. The cubic root of 64912801 is about 401.8926988522.

The spelling of 64912801 in words is "sixty-four million, nine hundred twelve thousand, eight hundred one".