81763645627 has 8 divisors (see below), whose sum is σ = 81857001600. Its totient is φ = 81670338624.

The previous prime is 81763645603. The next prime is 81763645631. The reversal of 81763645627 is 72654636718.

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 81763645627 - 2¹⁹ = 81763121339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81763645027) 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, 4072249 + ... + 4092277.

It is an arithmetic number, because the mean of its divisors is an integer number (10232125200).

Almost surely, 2^81763645627 is an apocalyptic number.

81763645627 is a deficient number, since it is larger than the sum of its proper divisors (93355973).

81763645627 is a wasteful number, since it uses less digits than its factorization.

81763645627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24485.

The product of its digits is 10160640, while the sum is 55.

The spelling of 81763645627 in words is "eighty-one billion, seven hundred sixty-three million, six hundred forty-five thousand, six hundred twenty-seven".