64524538 has 12 divisors (see below), whose sum is σ = 104805198. Its totient is φ = 29780400.

The previous prime is 64524533. The next prime is 64524563. The reversal of 64524538 is 83542546.

It can be written as a sum of positive squares in 3 ways, for example, as 34963569 + 29560969 = 5913^2 + 5437^2 .

It is a super-2 number, since 2×64524538² = 8326832008226888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64524497 and 64524506.

It is not an unprimeable number, because it can be changed into a prime (64524533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95113 + ... + 95788.

Almost surely, 2^64524538 is an apocalyptic number.

64524538 is a deficient number, since it is larger than the sum of its proper divisors (40280660).

64524538 is a wasteful number, since it uses less digits than its factorization.

64524538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190929 (or 190916 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 64524538 is about 8032.7167259900. The cubic root of 64524538 is about 401.0898155585.

The spelling of 64524538 in words is "sixty-four million, five hundred twenty-four thousand, five hundred thirty-eight".