206690161536 has 64 divisors (see below), whose sum is σ = 610023056400. Its totient is φ = 68896719360.

The previous prime is 206690161501. The next prime is 206690161547. The reversal of 206690161536 is 635161096602.

206690161536 is a `hidden beast` number, since 20 + 6 + 6 + 9 + 0 + 1 + 615 + 3 + 6 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 206690161491 and 206690161500.

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, 29899635 + ... + 29906546.

Almost surely, 2^206690161536 is an apocalyptic number.

It is an amenable number.

206690161536 is an abundant number, since it is smaller than the sum of its proper divisors (403332894864).

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

206690161536 is an equidigital number, since it uses as much as digits as its factorization.

206690161536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59806204 (or 59806186 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 206690161536 in words is "two hundred six billion, six hundred ninety million, one hundred sixty-one thousand, five hundred thirty-six".