1198812555720 has 192 divisors, whose sum is σ = 4196779095600. Its totient is φ = 295026554880.

The previous prime is 1198812555671. The next prime is 1198812555763. The reversal of 1198812555720 is 275552188911.

1198812555720 is a `hidden beast` number, since 1 + 1 + 9 + 8 + 8 + 12 + 55 + 572 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 421639838244 + 777172717476 = 649338^2 + 881574^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22948030 + ... + 23000210.

Almost surely, 2^{1198812555720} is an apocalyptic number.

1198812555720 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 1198812555720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2098389547800).

1198812555720 is an abundant number, since it is smaller than the sum of its proper divisors (2997966539880).

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

1198812555720 is a wasteful number, since it uses less digits than its factorization.

1198812555720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57120 (or 57113 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 54.

The spelling of 1198812555720 in words is "one trillion, one hundred ninety-eight billion, eight hundred twelve million, five hundred fifty-five thousand, seven hundred twenty".