18861054673608 has 256 divisors, whose sum is σ = 61408495104000. Its totient is φ = 5251552330752.

The previous prime is 18861054673603. The next prime is 18861054673631. The reversal of 18861054673608 is 80637645016881.

18861054673608 is a `hidden beast` number, since 1 + 8 + 8 + 6 + 10 + 5 + 4 + 6 + 7 + 3 + 608 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18861054673603) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28211616 + ... + 28872432.

It is an arithmetic number, because the mean of its divisors is an integer number (239876934000).

Almost surely, 2^{18861054673608} is an apocalyptic number.

18861054673608 is a gapful number since it is divisible by the number (18) 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 18861054673608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30704247552000).

18861054673608 is an abundant number, since it is smaller than the sum of its proper divisors (42547440430392).

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

18861054673608 is a wasteful number, since it uses less digits than its factorization.

18861054673608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661321 (or 661311 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 18861054673608 in words is "eighteen trillion, eight hundred sixty-one billion, fifty-four million, six hundred seventy-three thousand, six hundred eight".