618920455 has 8 divisors (see below), whose sum is σ = 774996192. Its totient is φ = 473608608.

The previous prime is 618920453. The next prime is 618920503. The reversal of 618920455 is 554029816.

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 618920455 - 2¹ = 618920453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618920453) 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, 2690844 + ... + 2691073.

It is an arithmetic number, because the mean of its divisors is an integer number (96874524).

Almost surely, 2^618920455 is an apocalyptic number.

618920455 is a deficient number, since it is larger than the sum of its proper divisors (156075737).

618920455 is a wasteful number, since it uses less digits than its factorization.

618920455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381945.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 618920455 is about 24878.1119661441. Note that the first 3 decimals coincide. The cubic root of 618920455 is about 852.2067021645.

The spelling of 618920455 in words is "six hundred eighteen million, nine hundred twenty thousand, four hundred fifty-five".