64202816738 has 4 divisors (see below), whose sum is σ = 96304225110. Its totient is φ = 32101408368.

The previous prime is 64202816729. The next prime is 64202816803. The reversal of 64202816738 is 83761820246.

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., 49334184769 + 14868631969 = 222113^2 + 121937^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64202816692 and 64202816701.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16050704183 + ... + 16050704186.

Almost surely, 2^64202816738 is an apocalyptic number.

64202816738 is a deficient number, since it is larger than the sum of its proper divisors (32101408372).

64202816738 is a wasteful number, since it uses less digits than its factorization.

64202816738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32101408371.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 64202816738 in words is "sixty-four billion, two hundred two million, eight hundred sixteen thousand, seven hundred thirty-eight".