64810748827744 has 48 divisors (see below), whose sum is σ = 132201803825280. Its totient is φ = 31243459553280.

The previous prime is 64810748827661. The next prime is 64810748827763. The reversal of 64810748827744 is 44772884701846.

It is a super-2 number, since 2×64810748827744² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121170729 + ... + 121704424.

It is an arithmetic number, because the mean of its divisors is an integer number (2754204246360).

Almost surely, 2^{64810748827744} is an apocalyptic number.

It is an amenable number.

64810748827744 is an abundant number, since it is smaller than the sum of its proper divisors (67391054997536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64810748827744 is a wasteful number, since it uses less digits than its factorization.

64810748827744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242875463 (or 242875455 counting only the distinct ones).

The product of its (nonzero) digits is 539492352, while the sum is 70.

The spelling of 64810748827744 in words is "sixty-four trillion, eight hundred ten billion, seven hundred forty-eight million, eight hundred twenty-seven thousand, seven hundred forty-four".