81527209346 has 8 divisors (see below), whose sum is σ = 133408160784. Its totient is φ = 37057822420.

The previous prime is 81527209277. The next prime is 81527209363. The reversal of 81527209346 is 64390272518.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81527209346.

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, 1852891100 + ... + 1852891143.

It is an arithmetic number, because the mean of its divisors is an integer number (16676020098).

It is a 1-persistent number, because it is pandigital, but 2⋅81527209346 = 163054418692 is not.

Almost surely, 2^81527209346 is an apocalyptic number.

81527209346 is a deficient number, since it is larger than the sum of its proper divisors (51880951438).

81527209346 is a wasteful number, since it uses less digits than its factorization.

81527209346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705782256.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 81527209346 in words is "eighty-one billion, five hundred twenty-seven million, two hundred nine thousand, three hundred forty-six".