64451008768 has 18 divisors (see below), whose sum is σ = 128650256294. Its totient is φ = 32225504256.

The previous prime is 64451008663. The next prime is 64451008771. The reversal of 64451008768 is 86780015446.

It can be written as a sum of positive squares in only one way, i.e., 64450992384 + 16384 = 253872^2 + 128^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125880621 + ... + 125881132.

Almost surely, 2^64451008768 is an apocalyptic number.

It is an amenable number.

64451008768 is a deficient number, since it is larger than the sum of its proper divisors (64199247526).

64451008768 is an equidigital number, since it uses as much as digits as its factorization.

64451008768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251761769 (or 251761755 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 64451008768 in words is "sixty-four billion, four hundred fifty-one million, eight thousand, seven hundred sixty-eight".