8081619697 has 8 divisors (see below), whose sum is σ = 8109498600. Its totient is φ = 8053785600.

The previous prime is 8081619683. The next prime is 8081619701. The reversal of 8081619697 is 7969161808.

It can be written as a sum of positive squares in 4 ways, for example, as 10214416 + 8071405281 = 3196^2 + 89841^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8081619697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8081619607) 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, 372447 + ... + 393547.

It is an arithmetic number, because the mean of its divisors is an integer number (1013687325).

Almost surely, 2^8081619697 is an apocalyptic number.

It is an amenable number.

8081619697 is a deficient number, since it is larger than the sum of its proper divisors (27878903).

8081619697 is a wasteful number, since it uses less digits than its factorization.

8081619697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22403.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 8081619697 is about 89897.8292118336. The cubic root of 8081619697 is about 2006.7786404768.

The spelling of 8081619697 in words is "eight billion, eighty-one million, six hundred nineteen thousand, six hundred ninety-seven".