1161516631 has 6 divisors (see below), whose sum is σ = 1276708496. Its totient is φ = 1055924100.

The previous prime is 1161516581. The next prime is 1161516667. The reversal of 1161516631 is 1366151611.

It is not a de Polignac number, because 1161516631 - 2⁹ = 1161516119 is a prime.

It is a super-2 number, since 2×1161516631² = 2698241768179180322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161516593 and 1161516602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161516331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4799535 + ... + 4799776.

Almost surely, 2^1161516631 is an apocalyptic number.

1161516631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1161516631 is a deficient number, since it is larger than the sum of its proper divisors (115191865).

1161516631 is an equidigital number, since it uses as much as digits as its factorization.

1161516631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9599333 (or 9599322 counting only the distinct ones).

The product of its digits is 3240, while the sum is 31.

The square root of 1161516631 is about 34081.0303688137. The cubic root of 1161516631 is about 1051.1752919867.

The spelling of 1161516631 in words is "one billion, one hundred sixty-one million, five hundred sixteen thousand, six hundred thirty-one".