64931456 has 32 divisors (see below), whose sum is σ = 131146500. Its totient is φ = 32016384.

The previous prime is 64931431. The next prime is 64931459. The reversal of 64931456 is 65413946.

64931456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61089856 + 3841600 = 7816^2 + 1960^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (64931459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5870 + ... + 12818.

Almost surely, 2^64931456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64931456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65573250).

64931456 is an abundant number, since it is smaller than the sum of its proper divisors (66215044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64931456 is an equidigital number, since it uses as much as digits as its factorization.

64931456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036 (or 7024 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 64931456 is about 8058.0057086105. The cubic root of 64931456 is about 401.9311945474.

The spelling of 64931456 in words is "sixty-four million, nine hundred thirty-one thousand, four hundred fifty-six".