1099198681776 has 400 divisors, whose sum is σ = 3453981056064. Its totient is φ = 335478786048.

The previous prime is 1099198681739. The next prime is 1099198681787. The reversal of 1099198681776 is 6771868919901.

It is a super-2 number, since 2×1099198681776² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1479405661 + ... + 1479406403.

Almost surely, 2^{1099198681776} is an apocalyptic number.

1099198681776 is a gapful number since it is divisible by the number (16) 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 1099198681776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726990528032).

1099198681776 is an abundant number, since it is smaller than the sum of its proper divisors (2354782374288).

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

1099198681776 is a wasteful number, since it uses less digits than its factorization.

1099198681776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 72.

The spelling of 1099198681776 in words is "one trillion, ninety-nine billion, one hundred ninety-eight million, six hundred eighty-one thousand, seven hundred seventy-six".