1016563605261 has 8 divisors (see below), whose sum is σ = 1435148619264. Its totient is φ = 637843830720.

The previous prime is 1016563605259. The next prime is 1016563605269. The reversal of 1016563605261 is 1625063656101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1016563605261 - 2¹ = 1016563605259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016563605269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9966309805 + ... + 9966309906.

It is an arithmetic number, because the mean of its divisors is an integer number (179393577408).

Almost surely, 2^{1016563605261} is an apocalyptic number.

It is an amenable number.

1016563605261 is a deficient number, since it is larger than the sum of its proper divisors (418585014003).

1016563605261 is a wasteful number, since it uses less digits than its factorization.

1016563605261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19932619731.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 1016563605261 in words is "one trillion, sixteen billion, five hundred sixty-three million, six hundred five thousand, two hundred sixty-one".