618161131 has 8 divisors (see below), whose sum is σ = 706929920. Its totient is φ = 529507368.

The previous prime is 618161083. The next prime is 618161171. The reversal of 618161131 is 131161816.

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

It is a cyclic number.

It is not a de Polignac number, because 618161131 - 2⁹ = 618160619 is a prime.

It is a super-2 number, since 2×618161131² = 764246367758398322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618161131.

It is not an unprimeable number, because it can be changed into a prime (618161171) 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, 16911 + ... + 39016.

It is an arithmetic number, because the mean of its divisors is an integer number (88366240).

Almost surely, 2^618161131 is an apocalyptic number.

618161131 is a deficient number, since it is larger than the sum of its proper divisors (88768789).

618161131 is a wasteful number, since it uses less digits than its factorization.

618161131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57513.

The product of its digits is 864, while the sum is 28.

The square root of 618161131 is about 24862.8463977880. The cubic root of 618161131 is about 851.8580489519.

The spelling of 618161131 in words is "six hundred eighteen million, one hundred sixty-one thousand, one hundred thirty-one".