206791695816 has 128 divisors (see below), whose sum is σ = 552558412800. Its totient is φ = 64300642560.

The previous prime is 206791695809. The next prime is 206791695827. The reversal of 206791695816 is 618596197602.

It is a self number, because there is not a number n which added to its sum of digits gives 206791695816.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28390111 + ... + 28397393.

It is an arithmetic number, because the mean of its divisors is an integer number (4316862600).

Almost surely, 2^206791695816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206791695816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276279206400).

206791695816 is an abundant number, since it is smaller than the sum of its proper divisors (345766716984).

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

206791695816 is a wasteful number, since it uses less digits than its factorization.

206791695816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8259 (or 8255 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 60.

The spelling of 206791695816 in words is "two hundred six billion, seven hundred ninety-one million, six hundred ninety-five thousand, eight hundred sixteen".