81468886880 has 24 divisors (see below), whose sum is σ = 192470245632. Its totient is φ = 32587554688.

The previous prime is 81468886841. The next prime is 81468886921. The reversal of 81468886880 is 8868886418.

It is a super-2 number, since 2×81468886880² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254590112 + ... + 254590431.

It is an arithmetic number, because the mean of its divisors is an integer number (8019593568).

Almost surely, 2^81468886880 is an apocalyptic number.

81468886880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81468886880 is an abundant number, since it is smaller than the sum of its proper divisors (111001358752).

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

81468886880 is a wasteful number, since it uses less digits than its factorization.

81468886880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509180558 (or 509180550 counting only the distinct ones).

The product of its (nonzero) digits is 37748736, while the sum is 65.

The spelling of 81468886880 in words is "eighty-one billion, four hundred sixty-eight million, eight hundred eighty-six thousand, eight hundred eighty".