81186567050014 has 4 divisors (see below), whose sum is σ = 121779850575024. Its totient is φ = 40593283525006.

The previous prime is 81186567049963. The next prime is 81186567050023. The reversal of 81186567050014 is 41005076568118.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20296641762502 + ... + 20296641762505.

It is an arithmetic number, because the mean of its divisors is an integer number (30444962643756).

Almost surely, 2^{81186567050014} is an apocalyptic number.

81186567050014 is a deficient number, since it is larger than the sum of its proper divisors (40593283525010).

81186567050014 is a wasteful number, since it uses less digits than its factorization.

81186567050014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40593283525009.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 81186567050014 in words is "eighty-one trillion, one hundred eighty-six billion, five hundred sixty-seven million, fifty thousand, fourteen".