64736497 has 12 divisors (see below), whose sum is σ = 77904180. Its totient is φ = 53573856.

The previous prime is 64736489. The next prime is 64736519. The reversal of 64736497 is 79463746.

It can be written as a sum of positive squares in 2 ways, for example, as 30735936 + 34000561 = 5544^2 + 5831^2 .

It is not a de Polignac number, because 64736497 - 2³ = 64736489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64736447) 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 11 ways as a sum of consecutive naturals, for example, 21358 + ... + 24199.

It is an arithmetic number, because the mean of its divisors is an integer number (6492015).

Almost surely, 2^64736497 is an apocalyptic number.

It is an amenable number.

64736497 is a deficient number, since it is larger than the sum of its proper divisors (13167683).

64736497 is a wasteful number, since it uses less digits than its factorization.

64736497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45600 (or 45593 counting only the distinct ones).

The product of its digits is 762048, while the sum is 46.

The square root of 64736497 is about 8045.8993903727. The cubic root of 64736497 is about 401.5285203737.

The spelling of 64736497 in words is "sixty-four million, seven hundred thirty-six thousand, four hundred ninety-seven".