64687702871 has 8 divisors (see below), whose sum is σ = 70771774464. Its totient is φ = 58637526520.

The previous prime is 64687702831. The next prime is 64687702909. The reversal of 64687702871 is 17820778646.

It is a happy number.

64687702871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64687702871 - 2¹⁰ = 64687701847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64687702831) 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, 8469815 + ... + 8477448.

It is an arithmetic number, because the mean of its divisors is an integer number (8846471808).

Almost surely, 2^64687702871 is an apocalyptic number.

64687702871 is a deficient number, since it is larger than the sum of its proper divisors (6084071593).

64687702871 is a wasteful number, since it uses less digits than its factorization.

64687702871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16947621.

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 64687702871 in words is "sixty-four billion, six hundred eighty-seven million, seven hundred two thousand, eight hundred seventy-one".