130136618 has 4 divisors (see below), whose sum is σ = 195204930. Its totient is φ = 65068308.

The previous prime is 130136569. The next prime is 130136623. The reversal of 130136618 is 816631031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816631031 = 23 ⋅35505697.

It can be written as a sum of positive squares in only one way, i.e., 80335369 + 49801249 = 8963^2 + 7057^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32534153 + ... + 32534156.

Almost surely, 2^130136618 is an apocalyptic number.

130136618 is a deficient number, since it is larger than the sum of its proper divisors (65068312).

130136618 is an equidigital number, since it uses as much as digits as its factorization.

130136618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65068311.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 130136618 is about 11407.7437734199. The cubic root of 130136618 is about 506.7570959515.

Adding to 130136618 its reverse (816631031), we get a palindrome (946767649).

The spelling of 130136618 in words is "one hundred thirty million, one hundred thirty-six thousand, six hundred eighteen".