1156166600565 has 64 divisors (see below), whose sum is σ = 1878831148032. Its totient is φ = 607047168000.

The previous prime is 1156166600513. The next prime is 1156166600591. The reversal of 1156166600565 is 5650066616511.

It is not a de Polignac number, because 1156166600565 - 2¹⁹ = 1156166076277 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 63 ways as a sum of consecutive naturals, for example, 204375217 + ... + 204380873.

It is an arithmetic number, because the mean of its divisors is an integer number (29356736688).

Almost surely, 2^{1156166600565} is an apocalyptic number.

1156166600565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1156166600565 is a deficient number, since it is larger than the sum of its proper divisors (722664547467).

1156166600565 is a wasteful number, since it uses less digits than its factorization.

1156166600565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 1156166600565 in words is "one trillion, one hundred fifty-six billion, one hundred sixty-six million, six hundred thousand, five hundred sixty-five".