81466882154 has 8 divisors (see below), whose sum is σ = 139657512288. Its totient is φ = 34914378060.

The previous prime is 81466882139. The next prime is 81466882169. The reversal of 81466882154 is 45128866418.

It is an interprime number because it is at equal distance from previous prime (81466882139) and next prime (81466882169).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81466882096 and 81466882105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2909531492 + ... + 2909531519.

It is an arithmetic number, because the mean of its divisors is an integer number (17457189036).

Almost surely, 2^81466882154 is an apocalyptic number.

81466882154 is a deficient number, since it is larger than the sum of its proper divisors (58190630134).

81466882154 is a wasteful number, since it uses less digits than its factorization.

81466882154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5819063020.

The product of its digits is 2949120, while the sum is 53.

The spelling of 81466882154 in words is "eighty-one billion, four hundred sixty-six million, eight hundred eighty-two thousand, one hundred fifty-four".