1985471970688 has 64 divisors (see below), whose sum is σ = 4267126033920. Its totient is φ = 916710645760.

The previous prime is 1985471970593. The next prime is 1985471970731. The reversal of 1985471970688 is 8860791745891.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1985471970688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8492608 + ... + 8723263.

It is an arithmetic number, because the mean of its divisors is an integer number (66673844280).

Almost surely, 2^{1985471970688} is an apocalyptic number.

It is an amenable number.

1985471970688 is an abundant number, since it is smaller than the sum of its proper divisors (2281654063232).

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

1985471970688 is a wasteful number, since it uses less digits than its factorization.

1985471970688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17215955 (or 17215943 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 73.

The spelling of 1985471970688 in words is "one trillion, nine hundred eighty-five billion, four hundred seventy-one million, nine hundred seventy thousand, six hundred eighty-eight".