1156311003161 has 16 divisors (see below), whose sum is σ = 1189488343680. Its totient is φ = 1123661543040.

The previous prime is 1156311003103. The next prime is 1156311003217. The reversal of 1156311003161 is 1613001136511.

It is a cyclic number.

It is not a de Polignac number, because 1156311003161 - 2¹⁰ = 1156311002137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156311003101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1459205 + ... + 2107581.

It is an arithmetic number, because the mean of its divisors is an integer number (74343021480).

Almost surely, 2^{1156311003161} is an apocalyptic number.

It is an amenable number.

1156311003161 is a deficient number, since it is larger than the sum of its proper divisors (33177340519).

1156311003161 is a wasteful number, since it uses less digits than its factorization.

1156311003161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648784.

The product of its (nonzero) digits is 1620, while the sum is 29.

Adding to 1156311003161 its reverse (1613001136511), we get a palindrome (2769312139672).

The spelling of 1156311003161 in words is "one trillion, one hundred fifty-six billion, three hundred eleven million, three thousand, one hundred sixty-one".