618394393447740 has 960 divisors, whose sum is σ = 2427525063118848. Its totient is φ = 128294108928000.

The previous prime is 618394393447609. The next prime is 618394393447807. The reversal of 618394393447740 is 47744393493816.

618394393447740 is a `hidden beast` number, since 6 + 1 + 8 + 3 + 94 + 3 + 93 + 447 + 7 + 4 + 0 = 666.

It is a super-2 number, since 2×618394393447740² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 319 ways as a sum of consecutive naturals, for example, 33515485515 + ... + 33515503965.

Almost surely, 2^{618394393447740} is an apocalyptic number.

618394393447740 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 618394393447740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213762531559424).

618394393447740 is an abundant number, since it is smaller than the sum of its proper divisors (1809130669671108).

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

618394393447740 is a wasteful number, since it uses less digits than its factorization.

618394393447740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22280 (or 22269 counting only the distinct ones).

The product of its (nonzero) digits is 1316818944, while the sum is 72.

The spelling of 618394393447740 in words is "six hundred eighteen trillion, three hundred ninety-four billion, three hundred ninety-three million, four hundred forty-seven thousand, seven hundred forty".