618686623340 has 96 divisors (see below), whose sum is σ = 1377422504640. Its totient is φ = 232774041600.

The previous prime is 618686623339. The next prime is 618686623351. The reversal of 618686623340 is 43326686816.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44080964 + ... + 44094996.

It is an arithmetic number, because the mean of its divisors is an integer number (14348151090).

Almost surely, 2^618686623340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618686623340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688711252320).

618686623340 is an abundant number, since it is smaller than the sum of its proper divisors (758735881300).

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

618686623340 is a wasteful number, since it uses less digits than its factorization.

618686623340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14883 (or 14881 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 53.

The spelling of 618686623340 in words is "six hundred eighteen billion, six hundred eighty-six million, six hundred twenty-three thousand, three hundred forty".