8081764551 has 80 divisors (see below), whose sum is σ = 14557480960. Its totient is φ = 4364902080.

The previous prime is 8081764547. The next prime is 8081764577. The reversal of 8081764551 is 1554671808.

8081764551 is a `hidden beast` number, since 80 + 8 + 17 + 6 + 4 + 551 = 666.

It is not a de Polignac number, because 8081764551 - 2² = 8081764547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8081764497 and 8081764506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081764591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8154666 + ... + 8155656.

It is an arithmetic number, because the mean of its divisors is an integer number (181968512).

Almost surely, 2^8081764551 is an apocalyptic number.

8081764551 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8081764551 is a deficient number, since it is larger than the sum of its proper divisors (6475716409).

8081764551 is a wasteful number, since it uses less digits than its factorization.

8081764551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 8081764551 is about 89898.6348672770. The cubic root of 8081764551 is about 2006.7906301598.

The spelling of 8081764551 in words is "eight billion, eighty-one million, seven hundred sixty-four thousand, five hundred fifty-one".