64481633 has 2 divisors, whose sum is σ = 64481634. Its totient is φ = 64481632.

The previous prime is 64481609. The next prime is 64481689. The reversal of 64481633 is 33618446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57866449 + 6615184 = 7607^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 64481633 - 2⁶ = 64481569 is a prime.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 64481593 and 64481602.

It is not a weakly prime, because it can be changed into another prime (64481693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32240816 + 32240817.

It is an arithmetic number, because the mean of its divisors is an integer number (32240817).

Almost surely, 2^64481633 is an apocalyptic number.

It is an amenable number.

64481633 is a deficient number, since it is larger than the sum of its proper divisors (1).

64481633 is an equidigital number, since it uses as much as digits as its factorization.

64481633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 64481633 is about 8030.0456412152. The cubic root of 64481633 is about 401.0008955148. Note that the first 3 decimals are identical.

The spelling of 64481633 in words is "sixty-four million, four hundred eighty-one thousand, six hundred thirty-three".