64078481 has 2 divisors, whose sum is σ = 64078482. Its totient is φ = 64078480.

The previous prime is 64078459. The next prime is 64078489. The reversal of 64078481 is 18487046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54982225 + 9096256 = 7415^2 + 3016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64078481 is a prime.

It is a super-2 number, since 2×64078481² = 8212103454534722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64078489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32039240 + 32039241.

It is an arithmetic number, because the mean of its divisors is an integer number (32039241).

Almost surely, 2^64078481 is an apocalyptic number.

It is an amenable number.

64078481 is a deficient number, since it is larger than the sum of its proper divisors (1).

64078481 is an equidigital number, since it uses as much as digits as its factorization.

64078481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 64078481 is about 8004.9035596939. The cubic root of 64078481 is about 400.1634352965.

The spelling of 64078481 in words is "sixty-four million, seventy-eight thousand, four hundred eighty-one".