1099885387860 has 576 divisors, whose sum is σ = 4137849031680. Its totient is φ = 230942638080.

The previous prime is 1099885387823. The next prime is 1099885387877. The reversal of 1099885387860 is 687835889901.

1099885387860 is a `hidden beast` number, since 1 + 0 + 9 + 9 + 8 + 8 + 538 + 7 + 86 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 162197670 + ... + 162204450.

It is an arithmetic number, because the mean of its divisors is an integer number (7183765680).

Almost surely, 2^{1099885387860} is an apocalyptic number.

1099885387860 is a gapful number since it is divisible by the number (10) 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 1099885387860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068924515840).

1099885387860 is an abundant number, since it is smaller than the sum of its proper divisors (3037963643820).

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

1099885387860 is a wasteful number, since it uses less digits than its factorization.

1099885387860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048 (or 7043 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 72.

The spelling of 1099885387860 in words is "one trillion, ninety-nine billion, eight hundred eighty-five million, three hundred eighty-seven thousand, eight hundred sixty".