811142155100 has 36 divisors (see below), whose sum is σ = 1765081558800. Its totient is φ = 323553068160.

The previous prime is 811142155097. The next prime is 811142155121. The reversal of 811142155100 is 1551241118.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11261345 + ... + 11333144.

It is an arithmetic number, because the mean of its divisors is an integer number (49030043300).

Almost surely, 2^811142155100 is an apocalyptic number.

It is an amenable number.

811142155100 is an abundant number, since it is smaller than the sum of its proper divisors (953939403700).

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

811142155100 is a wasteful number, since it uses less digits than its factorization.

811142155100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22594862 (or 22594855 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 29.

Adding to 811142155100 its reverse (1551241118), we get a palindrome (812693396218).

The spelling of 811142155100 in words is "eight hundred eleven billion, one hundred forty-two million, one hundred fifty-five thousand, one hundred".