1198684861920 has 576 divisors, whose sum is σ = 5170564264320. Its totient is φ = 246072950784.

The previous prime is 1198684861823. The next prime is 1198684861931. The reversal of 1198684861920 is 291684868911.

1198684861920 is a `hidden beast` number, since 1 + 1 + 9 + 8 + 6 + 8 + 4 + 8 + 619 + 2 + 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 polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4724866 + ... + 4972094.

It is an arithmetic number, because the mean of its divisors is an integer number (8976674070).

Almost surely, 2^{1198684861920} is an apocalyptic number.

1198684861920 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 1198684861920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2585282132160).

1198684861920 is an abundant number, since it is smaller than the sum of its proper divisors (3971879402400).

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

1198684861920 is a wasteful number, since it uses less digits than its factorization.

1198684861920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247307 (or 247296 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The spelling of 1198684861920 in words is "one trillion, one hundred ninety-eight billion, six hundred eighty-four million, eight hundred sixty-one thousand, nine hundred twenty".