1161001611 has 24 divisors (see below), whose sum is σ = 2090809344. Its totient is φ = 603117360.

The previous prime is 1161001607. The next prime is 1161001627.

1161001611 is nontrivially palindromic in base 10.

1161001611 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1161001611 - 2² = 1161001607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161005611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 836971 + ... + 838356.

It is an arithmetic number, because the mean of its divisors is an integer number (87117056).

Almost surely, 2^1161001611 is an apocalyptic number.

1161001611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1161001611 is a deficient number, since it is larger than the sum of its proper divisors (929807733).

1161001611 is a wasteful number, since it uses less digits than its factorization.

1161001611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675351 (or 1675348 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 1161001611 is about 34073.4737149003. The cubic root of 1161001611 is about 1051.0199042462.

It can be divided in two parts, 116100 and 1611, that added together give a palindrome (117711).

The spelling of 1161001611 in words is "one billion, one hundred sixty-one million, one thousand, six hundred eleven".