1163261613 has 8 divisors (see below), whose sum is σ = 1551596800. Its totient is φ = 775217088.

The previous prime is 1163261599. The next prime is 1163261621. The reversal of 1163261613 is 3161623611.

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

It is not a de Polignac number, because 1163261613 - 2⁵ = 1163261581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163261653) 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, 63148 + ... + 79461.

It is an arithmetic number, because the mean of its divisors is an integer number (193949600).

Almost surely, 2^1163261613 is an apocalyptic number.

It is an amenable number.

1163261613 is a deficient number, since it is larger than the sum of its proper divisors (388335187).

1163261613 is a wasteful number, since it uses less digits than its factorization.

1163261613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145331.

The product of its digits is 3888, while the sum is 30.

The square root of 1163261613 is about 34106.6212486667. The cubic root of 1163261613 is about 1051.7014328714.

The spelling of 1163261613 in words is "one billion, one hundred sixty-three million, two hundred sixty-one thousand, six hundred thirteen".