618244945920 has 3072 divisors, whose sum is σ = 2988969984000. Its totient is φ = 117719433216.

The previous prime is 618244945919. The next prime is 618244945933. The reversal of 618244945920 is 29549442816.

618244945920 is a `hidden beast` number, since 6 + 1 + 8 + 2 + 4 + 49 + 4 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3072).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 14377789419 + ... + 14377789461.

It is an arithmetic number, because the mean of its divisors is an integer number (972972000).

Almost surely, 2^618244945920 is an apocalyptic number.

618244945920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618244945920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1494484992000).

618244945920 is an abundant number, since it is smaller than the sum of its proper divisors (2370725038080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618244945920 is a wasteful number, since it uses less digits than its factorization.

618244945920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 618244945920 in words is "six hundred eighteen billion, two hundred forty-four million, nine hundred forty-five thousand, nine hundred twenty".