81230262696 has 256 divisors, whose sum is σ = 270376704000. Its totient is φ = 22305507840.

The previous prime is 81230262661. The next prime is 81230262703. The reversal of 81230262696 is 69626203218.

81230262696 is a `hidden beast` number, since 8 + 12 + 3 + 0 + 2 + 626 + 9 + 6 = 666.

It is a super-2 number, since 2×81230262696² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 999196 + ... + 1077428.

It is an arithmetic number, because the mean of its divisors is an integer number (1056159000).

Almost surely, 2^81230262696 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 81230262696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135188352000).

81230262696 is an abundant number, since it is smaller than the sum of its proper divisors (189146441304).

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

81230262696 is a wasteful number, since it uses less digits than its factorization.

81230262696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78301 (or 78291 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 81230262696 in words is "eighty-one billion, two hundred thirty million, two hundred sixty-two thousand, six hundred ninety-six".