8120081551 has 12 divisors (see below), whose sum is σ = 8271393312. Its totient is φ = 7971480000.

The previous prime is 8120081537. The next prime is 8120081561. The reversal of 8120081551 is 1551800218.

It is not a de Polignac number, because 8120081551 - 2¹⁹ = 8119557263 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 (8120081521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2234506 + ... + 2238136.

It is an arithmetic number, because the mean of its divisors is an integer number (689282776).

Almost surely, 2^8120081551 is an apocalyptic number.

8120081551 is a deficient number, since it is larger than the sum of its proper divisors (151311761).

8120081551 is an equidigital number, since it uses as much as digits as its factorization.

8120081551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354 (or 4293 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 31.

The square root of 8120081551 is about 90111.4951102244. The cubic root of 8120081551 is about 2009.9571413186.

Adding to 8120081551 its reverse (1551800218), we get a palindrome (9671881769).

The spelling of 8120081551 in words is "eight billion, one hundred twenty million, eighty-one thousand, five hundred fifty-one".