81136631030 has 192 divisors, whose sum is σ = 190051384320. Its totient is φ = 24239229696.

The previous prime is 81136631029. The next prime is 81136631087. The reversal of 81136631030 is 3013663118.

It is a super-3 number, since 3×81136631030³ (a number of 34 digits) contains 333 as substring.

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, 485848007 + ... + 485848173.

It is an arithmetic number, because the mean of its divisors is an integer number (989850960).

Almost surely, 2^81136631030 is an apocalyptic number.

81136631030 is an abundant number, since it is smaller than the sum of its proper divisors (108914753290).

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

81136631030 is a wasteful number, since it uses less digits than its factorization.

81136631030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 81136631030 in words is "eighty-one billion, one hundred thirty-six million, six hundred thirty-one thousand, thirty".