80816782551 has 4 divisors (see below), whose sum is σ = 107755710072. Its totient is φ = 53877855032.

The previous prime is 80816782523. The next prime is 80816782567. The reversal of 80816782551 is 15528761808.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80816782551 - 2¹³ = 80816774359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80816782494 and 80816782503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80816782051) 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 3 ways as a sum of consecutive naturals, for example, 13469463756 + ... + 13469463761.

It is an arithmetic number, because the mean of its divisors is an integer number (26938927518).

Almost surely, 2^80816782551 is an apocalyptic number.

80816782551 is a deficient number, since it is larger than the sum of its proper divisors (26938927521).

80816782551 is a wasteful number, since it uses less digits than its factorization.

80816782551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26938927520.

The product of its (nonzero) digits is 1075200, while the sum is 51.

The spelling of 80816782551 in words is "eighty billion, eight hundred sixteen million, seven hundred eighty-two thousand, five hundred fifty-one".