618461778445 has 16 divisors (see below), whose sum is σ = 856573941888. Its totient is φ = 419889182400.

The previous prime is 618461778401. The next prime is 618461778449. The reversal of 618461778445 is 544877164816.

It is not a de Polignac number, because 618461778445 - 2⁷ = 618461778317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618461778449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87473379 + ... + 87480448.

It is an arithmetic number, because the mean of its divisors is an integer number (53535871368).

Almost surely, 2^618461778445 is an apocalyptic number.

It is an amenable number.

618461778445 is a deficient number, since it is larger than the sum of its proper divisors (238112163443).

618461778445 is a wasteful number, since it uses less digits than its factorization.

618461778445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174953940.

The product of its digits is 36126720, while the sum is 61.

The spelling of 618461778445 in words is "six hundred eighteen billion, four hundred sixty-one million, seven hundred seventy-eight thousand, four hundred forty-five".