23161631618 has 8 divisors (see below), whose sum is σ = 34784358780. Its totient is φ = 11566845360.

The previous prime is 23161631609. The next prime is 23161631627. The reversal of 23161631618 is 81613616132.

It is an interprime number because it is at equal distance from previous prime (23161631609) and next prime (23161631627).

It can be written as a sum of positive squares in 2 ways, for example, as 21655182649 + 1506448969 = 147157^2 + 38813^2 .

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

It is a super-2 number, since 2×23161631618² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6983153 + ... + 6986468.

Almost surely, 2^23161631618 is an apocalyptic number.

23161631618 is a deficient number, since it is larger than the sum of its proper divisors (11622727162).

23161631618 is a wasteful number, since it uses less digits than its factorization.

23161631618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13970452.

The product of its digits is 31104, while the sum is 38.

The spelling of 23161631618 in words is "twenty-three billion, one hundred sixty-one million, six hundred thirty-one thousand, six hundred eighteen".