618445749 has 8 divisors (see below), whose sum is σ = 824810560. Its totient is φ = 412189056.

The previous prime is 618445747. The next prime is 618445777. The reversal of 618445749 is 947544816.

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

It is not a de Polignac number, because 618445749 - 2¹ = 618445747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 618445698 and 618445707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618445741) 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, 12577 + ... + 37350.

It is an arithmetic number, because the mean of its divisors is an integer number (103101320).

Almost surely, 2^618445749 is an apocalyptic number.

It is an amenable number.

618445749 is a deficient number, since it is larger than the sum of its proper divisors (206364811).

618445749 is a wasteful number, since it uses less digits than its factorization.

618445749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54059.

The product of its digits is 967680, while the sum is 48.

The square root of 618445749 is about 24868.5695004759. The cubic root of 618445749 is about 851.9887683392.

The spelling of 618445749 in words is "six hundred eighteen million, four hundred forty-five thousand, seven hundred forty-nine".