64985902870 has 64 divisors (see below), whose sum is σ = 136130144256. Its totient is φ = 21874769280.

The previous prime is 64985902847. The next prime is 64985902913. The reversal of 64985902870 is 7820958946.

It is a super-3 number, since 3×64985902870³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2321779 + ... + 2349601.

It is an arithmetic number, because the mean of its divisors is an integer number (2127033504).

Almost surely, 2^64985902870 is an apocalyptic number.

64985902870 is an abundant number, since it is smaller than the sum of its proper divisors (71144241386).

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

64985902870 is a wasteful number, since it uses less digits than its factorization.

64985902870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28445.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 64985902870 in words is "sixty-four billion, nine hundred eighty-five million, nine hundred two thousand, eight hundred seventy".