618261055 has 8 divisors (see below), whose sum is σ = 765846144. Its totient is φ = 478653600.

The previous prime is 618261043. The next prime is 618261071. The reversal of 618261055 is 550162816.

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 618261055 - 2¹³ = 618252863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618261055.

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, 1994236 + ... + 1994545.

It is an arithmetic number, because the mean of its divisors is an integer number (95730768).

Almost surely, 2^618261055 is an apocalyptic number.

618261055 is a deficient number, since it is larger than the sum of its proper divisors (147585089).

618261055 is a wasteful number, since it uses less digits than its factorization.

618261055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988817.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 618261055 is about 24864.8558210177. The cubic root of 618261055 is about 851.9039466277.

The spelling of 618261055 in words is "six hundred eighteen million, two hundred sixty-one thousand, fifty-five".