618401685129 has 8 divisors (see below), whose sum is σ = 824557955040. Its totient is φ = 412256602656.

The previous prime is 618401685113. The next prime is 618401685169. The reversal of 618401685129 is 921586104816.

It is a happy number.

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

It is not a de Polignac number, because 618401685129 - 2⁴ = 618401685113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (618401685169) 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, 2667019 + ... + 2889600.

It is an arithmetic number, because the mean of its divisors is an integer number (103069744380).

Almost surely, 2^618401685129 is an apocalyptic number.

It is an amenable number.

618401685129 is a deficient number, since it is larger than the sum of its proper divisors (206156269911).

618401685129 is a wasteful number, since it uses less digits than its factorization.

618401685129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593719.

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 618401685129 in words is "six hundred eighteen billion, four hundred one million, six hundred eighty-five thousand, one hundred twenty-nine".