64765440874 has 4 divisors (see below), whose sum is σ = 97148161314. Its totient is φ = 32382720436.

The previous prime is 64765440869. The next prime is 64765440881. The reversal of 64765440874 is 47804456746.

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., 64030759849 + 734681025 = 253043^2 + 27105^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16191360217 + ... + 16191360220.

Almost surely, 2^64765440874 is an apocalyptic number.

64765440874 is a deficient number, since it is larger than the sum of its proper divisors (32382720440).

64765440874 is a wasteful number, since it uses less digits than its factorization.

64765440874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32382720439.

The product of its (nonzero) digits is 18063360, while the sum is 55.

The spelling of 64765440874 in words is "sixty-four billion, seven hundred sixty-five million, four hundred forty thousand, eight hundred seventy-four".