81414210172 has 24 divisors (see below), whose sum is σ = 142740526320. Its totient is φ = 40631270400.

The previous prime is 81414210103. The next prime is 81414210191. The reversal of 81414210172 is 27101241418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5646172 + ... + 5660572.

It is an arithmetic number, because the mean of its divisors is an integer number (5947521930).

Almost surely, 2^81414210172 is an apocalyptic number.

It is an amenable number.

81414210172 is a deficient number, since it is larger than the sum of its proper divisors (61326316148).

81414210172 is a wasteful number, since it uses less digits than its factorization.

81414210172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16941 (or 16939 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The spelling of 81414210172 in words is "eighty-one billion, four hundred fourteen million, two hundred ten thousand, one hundred seventy-two".