64964961 has 12 divisors (see below), whose sum is σ = 93979860. Its totient is φ = 43244640.

The previous prime is 64964957. The next prime is 64964969. The reversal of 64964961 is 16946946.

It can be written as a sum of positive squares in 2 ways, for example, as 22467600 + 42497361 = 4740^2 + 6519^2 .

It is not a de Polignac number, because 64964961 - 2² = 64964957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64964969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1291 + ... + 11471.

It is an arithmetic number, because the mean of its divisors is an integer number (7831655).

Almost surely, 2^64964961 is an apocalyptic number.

It is an amenable number.

64964961 is a deficient number, since it is larger than the sum of its proper divisors (29014899).

64964961 is a wasteful number, since it uses less digits than its factorization.

64964961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10896 (or 10893 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 64964961 is about 8060.0844288382. The cubic root of 64964961 is about 402.0003155860. Note that the first 3 decimals are identical.

The spelling of 64964961 in words is "sixty-four million, nine hundred sixty-four thousand, nine hundred sixty-one".