1161613461 has 4 divisors (see below), whose sum is σ = 1548817952. Its totient is φ = 774408972.

The previous prime is 1161613441. The next prime is 1161613471. The reversal of 1161613461 is 1643161611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1161613461 - 2¹⁹ = 1161089173 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 (1161613421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193602241 + ... + 193602246.

It is an arithmetic number, because the mean of its divisors is an integer number (387204488).

Almost surely, 2^1161613461 is an apocalyptic number.

It is an amenable number.

1161613461 is a deficient number, since it is larger than the sum of its proper divisors (387204491).

1161613461 is an equidigital number, since it uses as much as digits as its factorization.

1161613461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387204490.

The product of its digits is 2592, while the sum is 30.

The square root of 1161613461 is about 34082.4509241926. The cubic root of 1161613461 is about 1051.2045016346.

The spelling of 1161613461 in words is "one billion, one hundred sixty-one million, six hundred thirteen thousand, four hundred sixty-one".