81418983979014 has 96 divisors (see below), whose sum is σ = 207284561827200. Its totient is φ = 22830292558080.

The previous prime is 81418983979013. The next prime is 81418983979061. The reversal of 81418983979014 is 41097938981418.

81418983979014 is a `hidden beast` number, since 8 + 1 + 418 + 98 + 39 + 7 + 90 + 1 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81418983979013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251494899 + ... + 251818430.

It is an arithmetic number, because the mean of its divisors is an integer number (2159214185700).

Almost surely, 2^{81418983979014} is an apocalyptic number.

81418983979014 is an abundant number, since it is smaller than the sum of its proper divisors (125865577848186).

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

81418983979014 is a wasteful number, since it uses less digits than its factorization.

81418983979014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503313410 (or 503313407 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 72.

The spelling of 81418983979014 in words is "eighty-one trillion, four hundred eighteen billion, nine hundred eighty-three million, nine hundred seventy-nine thousand, fourteen".