1011661516206 has 48 divisors (see below), whose sum is σ = 2404558690560. Its totient is φ = 304851436560.

The previous prime is 1011661516111. The next prime is 1011661516231. The reversal of 1011661516206 is 6026151661101.

1011661516206 is a `hidden beast` number, since 1 + 0 + 1 + 1 + 6 + 615 + 16 + 20 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14236630 + ... + 14307513.

It is an arithmetic number, because the mean of its divisors is an integer number (50094972720).

Almost surely, 2^{1011661516206} is an apocalyptic number.

1011661516206 is an abundant number, since it is smaller than the sum of its proper divisors (1392897174354).

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

1011661516206 is a wasteful number, since it uses less digits than its factorization.

1011661516206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28544341 (or 28544338 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 1011661516206 in words is "one trillion, eleven billion, six hundred sixty-one million, five hundred sixteen thousand, two hundred six".