81014670127511 has 4 divisors (see below), whose sum is σ = 81021334174392. Its totient is φ = 81008006080632.

The previous prime is 81014670127481. The next prime is 81014670127591. The reversal of 81014670127511 is 11572107641018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81014670127511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81014670127591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3332005205 + ... + 3332029518.

It is an arithmetic number, because the mean of its divisors is an integer number (20255333543598).

Almost surely, 2^{81014670127511} is an apocalyptic number.

81014670127511 is a deficient number, since it is larger than the sum of its proper divisors (6664046881).

81014670127511 is a wasteful number, since it uses less digits than its factorization.

81014670127511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664046880.

The product of its (nonzero) digits is 94080, while the sum is 44.

Adding to 81014670127511 its reverse (11572107641018), we get a palindrome (92586777768529).

The spelling of 81014670127511 in words is "eighty-one trillion, fourteen billion, six hundred seventy million, one hundred twenty-seven thousand, five hundred eleven".