618660439740 has 288 divisors, whose sum is σ = 2246055013440. Its totient is φ = 140960107008.

The previous prime is 618660439739. The next prime is 618660439751. The reversal of 618660439740 is 47934066816.

618660439740 is a `hidden beast` number, since 6 + 1 + 86 + 60 + 439 + 74 + 0 = 666.

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 95 ways as a sum of consecutive naturals, for example, 8350942 + ... + 8424698.

It is an arithmetic number, because the mean of its divisors is an integer number (7798802130).

Almost surely, 2^618660439740 is an apocalyptic number.

618660439740 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 618660439740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1123027506720).

618660439740 is an abundant number, since it is smaller than the sum of its proper divisors (1627394573700).

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

618660439740 is a wasteful number, since it uses less digits than its factorization.

618660439740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74106 (or 74091 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 618660439740 in words is "six hundred eighteen billion, six hundred sixty million, four hundred thirty-nine thousand, seven hundred forty".