64985902871 has 8 divisors (see below), whose sum is σ = 65426978688. Its totient is φ = 64546083000.

The previous prime is 64985902847. The next prime is 64985902913. The reversal of 64985902871 is 17820958946.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64985902871 is a prime.

It is a super-3 number, since 3×64985902871³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64985902871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64985902811) 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, 210035 + ... + 417236.

It is an arithmetic number, because the mean of its divisors is an integer number (8178372336).

Almost surely, 2^64985902871 is an apocalyptic number.

64985902871 is a deficient number, since it is larger than the sum of its proper divisors (441075817).

64985902871 is a wasteful number, since it uses less digits than its factorization.

64985902871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627973.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 64985902871 in words is "sixty-four billion, nine hundred eighty-five million, nine hundred two thousand, eight hundred seventy-one".