16816812125640 has 32 divisors (see below), whose sum is σ = 50450436377280. Its totient is φ = 4484483233472.

The previous prime is 16816812125623. The next prime is 16816812125651. The reversal of 16816812125640 is 4652121861861.

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, 70070050404 + ... + 70070050643.

It is an arithmetic number, because the mean of its divisors is an integer number (1576576136790).

Almost surely, 2^{16816812125640} is an apocalyptic number.

16816812125640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16816812125640 is an abundant number, since it is smaller than the sum of its proper divisors (33633624251640).

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

16816812125640 is a wasteful number, since it uses less digits than its factorization.

16816812125640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140140101061 (or 140140101057 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 16816812125640 in words is "sixteen trillion, eight hundred sixteen billion, eight hundred twelve million, one hundred twenty-five thousand, six hundred forty".