81764714047 has 8 divisors (see below), whose sum is σ = 81855601040. Its totient is φ = 81673868160.

The previous prime is 81764714029. The next prime is 81764714077. The reversal of 81764714047 is 74041746718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81764714047 - 2¹¹ = 81764711999 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 (81764714027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5525104 + ... + 5539882.

It is an arithmetic number, because the mean of its divisors is an integer number (10231950130).

Almost surely, 2^81764714047 is an apocalyptic number.

81764714047 is a deficient number, since it is larger than the sum of its proper divisors (90886993).

81764714047 is a wasteful number, since it uses less digits than its factorization.

81764714047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553.

The product of its (nonzero) digits is 1053696, while the sum is 49.

The spelling of 81764714047 in words is "eighty-one billion, seven hundred sixty-four million, seven hundred fourteen thousand, forty-seven".