8081620722577 has 4 divisors (see below), whose sum is σ = 8506969181680. Its totient is φ = 7656272263476.

The previous prime is 8081620722559. The next prime is 8081620722583. The reversal of 8081620722577 is 7752270261808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8081620722577 - 2⁷ = 8081620722449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8081620722547) 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, 212674229523 + ... + 212674229560.

It is an arithmetic number, because the mean of its divisors is an integer number (2126742295420).

Almost surely, 2^{8081620722577} is an apocalyptic number.

It is an amenable number.

8081620722577 is a deficient number, since it is larger than the sum of its proper divisors (425348459103).

8081620722577 is a wasteful number, since it uses less digits than its factorization.

8081620722577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425348459102.

The product of its (nonzero) digits is 5268480, while the sum is 55.

The spelling of 8081620722577 in words is "eight trillion, eighty-one billion, six hundred twenty million, seven hundred twenty-two thousand, five hundred seventy-seven".