618471917560728 has 512 divisors, whose sum is σ = 2341045562572800. Its totient is φ = 146315343513600.

The previous prime is 618471917560703. The next prime is 618471917560733. The reversal of 618471917560728 is 827065719174816.

618471917560728 is a `hidden beast` number, since 6 + 1 + 8 + 4 + 7 + 1 + 9 + 1 + 7 + 5 + 607 + 2 + 8 = 666.

It is a super-2 number, since 2×618471917560728² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26515450 + ... + 44045577.

It is an arithmetic number, because the mean of its divisors is an integer number (4572354614400).

Almost surely, 2^{618471917560728} is an apocalyptic number.

618471917560728 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

618471917560728 is an abundant number, since it is smaller than the sum of its proper divisors (1722573645012072).

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

618471917560728 is a wasteful number, since it uses less digits than its factorization.

618471917560728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70561108 (or 70561098 counting only the distinct ones).

The product of its (nonzero) digits is 284497920, while the sum is 72.

The spelling of 618471917560728 in words is "six hundred eighteen trillion, four hundred seventy-one billion, nine hundred seventeen million, five hundred sixty thousand, seven hundred twenty-eight".