81767382460 has 24 divisors (see below), whose sum is σ = 172144042560. Its totient is φ = 32624564544.

The previous prime is 81767382451. The next prime is 81767382467. The reversal of 81767382460 is 6428376718.

It is a junction number, because it is equal to n+sod(n) for n = 81767382398 and 81767382407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81767382467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5141140 + ... + 5157019.

It is an arithmetic number, because the mean of its divisors is an integer number (7172668440).

Almost surely, 2^81767382460 is an apocalyptic number.

It is an amenable number.

81767382460 is an abundant number, since it is smaller than the sum of its proper divisors (90376660100).

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

81767382460 is a wasteful number, since it uses less digits than its factorization.

81767382460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10298565 (or 10298563 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 81767382460 in words is "eighty-one billion, seven hundred sixty-seven million, three hundred eighty-two thousand, four hundred sixty".