1181794071648 has 192 divisors, whose sum is σ = 3314569144320. Its totient is φ = 367871078400.

The previous prime is 1181794071631. The next prime is 1181794071649. The reversal of 1181794071648 is 8461704971811.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181794071649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239663743 + ... + 239668673.

It is an arithmetic number, because the mean of its divisors is an integer number (17263380960).

Almost surely, 2^{1181794071648} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1181794071648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1657284572160).

1181794071648 is an abundant number, since it is smaller than the sum of its proper divisors (2132775072672).

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

1181794071648 is a wasteful number, since it uses less digits than its factorization.

1181794071648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7781 (or 7773 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 57.

The spelling of 1181794071648 in words is "one trillion, one hundred eighty-one billion, seven hundred ninety-four million, seventy-one thousand, six hundred forty-eight".