1165551611001 has 8 divisors (see below), whose sum is σ = 1554296477664. Its totient is φ = 776920575840.

The previous prime is 1165551610963. The next prime is 1165551611011. The reversal of 1165551611001 is 1001161555611.

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

It is not a de Polignac number, because 1165551611001 - 2²⁶ = 1165484502137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165551611011) 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, 28433980 + ... + 28474941.

It is an arithmetic number, because the mean of its divisors is an integer number (194287059708).

Almost surely, 2^{1165551611001} is an apocalyptic number.

It is an amenable number.

1165551611001 is a deficient number, since it is larger than the sum of its proper divisors (388744866663).

1165551611001 is an equidigital number, since it uses as much as digits as its factorization.

1165551611001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56915751.

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 1165551611001 in words is "one trillion, one hundred sixty-five billion, five hundred fifty-one million, six hundred eleven thousand, one".