82805307555551 has 8 divisors (see below), whose sum is σ = 95379791831040. Its totient is φ = 70417111936248.

The previous prime is 82805307555469. The next prime is 82805307555563. The reversal of 82805307555551 is 15555570350828.

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

It is not a de Polignac number, because 82805307555551 - 2¹⁰ = 82805307554527 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 (82805307555571) 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, 46572163091 + ... + 46572164868.

It is an arithmetic number, because the mean of its divisors is an integer number (11922473978880).

Almost surely, 2^{82805307555551} is an apocalyptic number.

82805307555551 is a deficient number, since it is larger than the sum of its proper divisors (12574484275489).

82805307555551 is a wasteful number, since it uses less digits than its factorization.

82805307555551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93144328093.

The product of its (nonzero) digits is 42000000, while the sum is 59.

The spelling of 82805307555551 in words is "eighty-two trillion, eight hundred five billion, three hundred seven million, five hundred fifty-five thousand, five hundred fifty-one".