64485961 has 4 divisors (see below), whose sum is σ = 64677652. Its totient is φ = 64294272.

The previous prime is 64485919. The next prime is 64485973. The reversal of 64485961 is 16958446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27762361 + 36723600 = 5269^2 + 6060^2 .

It is a cyclic number.

It is not a de Polignac number, because 64485961 - 2¹⁷ = 64354889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64485991) 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, 95340 + ... + 96013.

It is an arithmetic number, because the mean of its divisors is an integer number (16169413).

Almost surely, 2^64485961 is an apocalyptic number.

It is an amenable number.

64485961 is a deficient number, since it is larger than the sum of its proper divisors (191691).

64485961 is a wasteful number, since it uses less digits than its factorization.

64485961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191690.

The product of its digits is 207360, while the sum is 43.

The square root of 64485961 is about 8030.3151245764. The cubic root of 64485961 is about 401.0098670259.

The spelling of 64485961 in words is "sixty-four million, four hundred eighty-five thousand, nine hundred sixty-one".