1161372821982 has 16 divisors (see below), whose sum is σ = 2323709068032. Its totient is φ = 386963703320.

The previous prime is 1161372821977. The next prime is 1161372821993. The reversal of 1161372821982 is 2891282731611.

It is a happy number.

It is a super-3 number, since 3×1161372821982³ (a number of 37 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40126998 + ... + 40155929.

It is an arithmetic number, because the mean of its divisors is an integer number (145231816752).

Almost surely, 2^{1161372821982} is an apocalyptic number.

1161372821982 is an abundant number, since it is smaller than the sum of its proper divisors (1162336246050).

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

1161372821982 is a wasteful number, since it uses less digits than its factorization.

1161372821982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80285343.

The product of its digits is 580608, while the sum is 51.

The spelling of 1161372821982 in words is "one trillion, one hundred sixty-one billion, three hundred seventy-two million, eight hundred twenty-one thousand, nine hundred eighty-two".