64755102721 has 8 divisors (see below), whose sum is σ = 67217019264. Its totient is φ = 62338359120.

The previous prime is 64755102701. The next prime is 64755102739. The reversal of 64755102721 is 12720155746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64755102721 - 2⁷ = 64755102593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64755102701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11290315 + ... + 11296048.

It is an arithmetic number, because the mean of its divisors is an integer number (8402127408).

Almost surely, 2^64755102721 is an apocalyptic number.

64755102721 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

64755102721 is a deficient number, since it is larger than the sum of its proper divisors (2461916543).

64755102721 is a wasteful number, since it uses less digits than its factorization.

64755102721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22586471.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 64755102721 in words is "sixty-four billion, seven hundred fifty-five million, one hundred two thousand, seven hundred twenty-one".