64445461 has 4 divisors (see below), whose sum is σ = 64554732. Its totient is φ = 64336192.

The previous prime is 64445449. The next prime is 64445483. The reversal of 64445461 is 16454446.

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 50495236 + 13950225 = 7106^2 + 3735^2 .

It is a cyclic number.

It is not a de Polignac number, because 64445461 - 2⁹ = 64444949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64445401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53746 + ... + 54931.

It is an arithmetic number, because the mean of its divisors is an integer number (16138683).

Almost surely, 2^64445461 is an apocalyptic number.

It is an amenable number.

64445461 is a deficient number, since it is larger than the sum of its proper divisors (109271).

64445461 is a wasteful number, since it uses less digits than its factorization.

64445461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109270.

The product of its digits is 46080, while the sum is 34.

The square root of 64445461 is about 8027.7930342031. The cubic root of 64445461 is about 400.9258988745.

The spelling of 64445461 in words is "sixty-four million, four hundred forty-five thousand, four hundred sixty-one".