64756474 has 4 divisors (see below), whose sum is σ = 97134714. Its totient is φ = 32378236.

The previous prime is 64756469. The next prime is 64756481. The reversal of 64756474 is 47465746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42994249 + 21762225 = 6557^2 + 4665^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64756474.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16189117 + ... + 16189120.

Almost surely, 2^64756474 is an apocalyptic number.

64756474 is a deficient number, since it is larger than the sum of its proper divisors (32378240).

64756474 is a wasteful number, since it uses less digits than its factorization.

64756474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32378239.

The product of its digits is 564480, while the sum is 43.

The square root of 64756474 is about 8047.1407344472. The cubic root of 64756474 is about 401.5698186143.

It can be divided in two parts, 647 and 56474, that added together give a square (57121 = 239²).

The spelling of 64756474 in words is "sixty-four million, seven hundred fifty-six thousand, four hundred seventy-four".