618881245 has 8 divisors (see below), whose sum is σ = 742956984. Its totient is φ = 494905344.

The previous prime is 618881239. The next prime is 618881261. The reversal of 618881245 is 542188816.

618881245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 158306724 + 460574521 = 12582^2 + 21461^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 618881245 - 2¹¹ = 618879197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10564 + ... + 36733.

It is an arithmetic number, because the mean of its divisors is an integer number (92869623).

Almost surely, 2^618881245 is an apocalyptic number.

It is an amenable number.

618881245 is a deficient number, since it is larger than the sum of its proper divisors (124075739).

618881245 is a wasteful number, since it uses less digits than its factorization.

618881245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49919.

The product of its digits is 122880, while the sum is 43.

The square root of 618881245 is about 24877.3239115464. The cubic root of 618881245 is about 852.1887053820.

The spelling of 618881245 in words is "six hundred eighteen million, eight hundred eighty-one thousand, two hundred forty-five".