1618129355 has 4 divisors (see below), whose sum is σ = 1941755232. Its totient is φ = 1294503480.

The previous prime is 1618129291. The next prime is 1618129361. The reversal of 1618129355 is 5539218161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5539218161 = 43 ⋅128819027.

It is not a de Polignac number, because 1618129355 - 2⁶ = 1618129291 is a prime.

It is a Duffinian number.

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, 161812931 + ... + 161812940.

It is an arithmetic number, because the mean of its divisors is an integer number (485438808).

Almost surely, 2^1618129355 is an apocalyptic number.

1618129355 is a deficient number, since it is larger than the sum of its proper divisors (323625877).

1618129355 is an equidigital number, since it uses as much as digits as its factorization.

1618129355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323625876.

The product of its digits is 64800, while the sum is 41.

The square root of 1618129355 is about 40225.9786083571. The cubic root of 1618129355 is about 1174.0080609813.

The spelling of 1618129355 in words is "one billion, six hundred eighteen million, one hundred twenty-nine thousand, three hundred fifty-five".