618642499860 has 1152 divisors, whose sum is σ = 2557555015680. Its totient is φ = 122634086400.

The previous prime is 618642499771. The next prime is 618642499873. The reversal of 618642499860 is 68994246816.

618642499860 is a `hidden beast` number, since 6 + 1 + 8 + 64 + 2 + 499 + 86 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 560872069 + ... + 560873171.

It is an arithmetic number, because the mean of its divisors is an integer number (2220099840).

Almost surely, 2^618642499860 is an apocalyptic number.

618642499860 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 618642499860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278777507840).

618642499860 is an abundant number, since it is smaller than the sum of its proper divisors (1938912515820).

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

618642499860 is a wasteful number, since it uses less digits than its factorization.

618642499860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 63.

The spelling of 618642499860 in words is "six hundred eighteen billion, six hundred forty-two million, four hundred ninety-nine thousand, eight hundred sixty".