1316225506566 has 32 divisors (see below), whose sum is σ = 2791649575008. Its totient is φ = 412289269760.

The previous prime is 1316225506537. The next prime is 1316225506573. The reversal of 1316225506566 is 6656055226131.

It is a super-2 number, since 2×1316225506566² (a number of 25 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 10000275 + ... + 10131038.

It is an arithmetic number, because the mean of its divisors is an integer number (87239049219).

Almost surely, 2^{1316225506566} is an apocalyptic number.

1316225506566 is an abundant number, since it is smaller than the sum of its proper divisors (1475424068442).

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

1316225506566 is a wasteful number, since it uses less digits than its factorization.

1316225506566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20131976.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 1316225506566 in words is "one trillion, three hundred sixteen billion, two hundred twenty-five million, five hundred six thousand, five hundred sixty-six".