81270182215245 has 16 divisors (see below), whose sum is σ = 130054523227200. Its totient is φ = 43336686620544.

The previous prime is 81270182215241. The next prime is 81270182215259. The reversal of 81270182215245 is 54251228107218.

It is a happy number.

It is not a de Polignac number, because 81270182215245 - 2² = 81270182215241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81270182215194 and 81270182215203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81270182215241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463069399 + ... + 463244868.

It is an arithmetic number, because the mean of its divisors is an integer number (8128407701700).

Almost surely, 2^{81270182215245} is an apocalyptic number.

It is an amenable number.

81270182215245 is a deficient number, since it is larger than the sum of its proper divisors (48784341011955).

81270182215245 is a wasteful number, since it uses less digits than its factorization.

81270182215245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926320124.

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 81270182215245 in words is "eighty-one trillion, two hundred seventy billion, one hundred eighty-two million, two hundred fifteen thousand, two hundred forty-five".