1165056500651 has 4 divisors (see below), whose sum is σ = 1193472512904. Its totient is φ = 1136640488400.

The previous prime is 1165056500617. The next prime is 1165056500659. The reversal of 1165056500651 is 1560056505611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1165056500651 - 2¹⁰ = 1165056499627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 28416012211 = 1165056500651 / (1 + 1 + 6 + 5 + 0 + 5 + 6 + 5 + 0 + 0 + 6 + 5 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1165056500599 and 1165056500608.

It is not an unprimeable number, because it can be changed into a prime (1165056500659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14208006065 + ... + 14208006146.

It is an arithmetic number, because the mean of its divisors is an integer number (298368128226).

Almost surely, 2^{1165056500651} is an apocalyptic number.

1165056500651 is a deficient number, since it is larger than the sum of its proper divisors (28416012253).

1165056500651 is an equidigital number, since it uses as much as digits as its factorization.

1165056500651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28416012252.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 1165056500651 in words is "one trillion, one hundred sixty-five billion, fifty-six million, five hundred thousand, six hundred fifty-one".