81269087154 has 8 divisors (see below), whose sum is σ = 162538174320. Its totient is φ = 27089695716.

The previous prime is 81269087149. The next prime is 81269087161. The reversal of 81269087154 is 45178096218.

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

81269087154 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 81269087097 and 81269087106.

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 3 ways as a sum of consecutive naturals, for example, 6772423924 + ... + 6772423935.

It is an arithmetic number, because the mean of its divisors is an integer number (20317271790).

Almost surely, 2^81269087154 is an apocalyptic number.

81269087154 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81269087154 is a wasteful number, since it uses less digits than its factorization.

81269087154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13544847864.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 81269087154 in words is "eighty-one billion, two hundred sixty-nine million, eighty-seven thousand, one hundred fifty-four".