81703145471 has 4 divisors (see below), whose sum is σ = 81704280000. Its totient is φ = 81702010944.

The previous prime is 81703145467. The next prime is 81703145473. The reversal of 81703145471 is 17454130718.

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

It is a cyclic number.

It is not a de Polignac number, because 81703145471 - 2² = 81703145467 is a prime.

It is a super-3 number, since 3×81703145471³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81703145473) 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, 451346 + ... + 605903.

It is an arithmetic number, because the mean of its divisors is an integer number (20426070000).

Almost surely, 2^81703145471 is an apocalyptic number.

81703145471 is a deficient number, since it is larger than the sum of its proper divisors (1134529).

81703145471 is a wasteful number, since it uses less digits than its factorization.

81703145471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134528.

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 81703145471 in words is "eighty-one billion, seven hundred three million, one hundred forty-five thousand, four hundred seventy-one".