81052077207 has 16 divisors (see below), whose sum is σ = 110419218432. Its totient is φ = 52860877920.

The previous prime is 81052077187. The next prime is 81052077287. The reversal of 81052077207 is 70277025018.

It is not a de Polignac number, because 81052077207 - 2⁷ = 81052077079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81052077287) 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 15 ways as a sum of consecutive naturals, for example, 180957 + ... + 441417.

It is an arithmetic number, because the mean of its divisors is an integer number (6901201152).

Almost surely, 2^81052077207 is an apocalyptic number.

81052077207 is a deficient number, since it is larger than the sum of its proper divisors (29367141225).

81052077207 is a wasteful number, since it uses less digits than its factorization.

81052077207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262718.

The product of its (nonzero) digits is 54880, while the sum is 39.

The spelling of 81052077207 in words is "eighty-one billion, fifty-two million, seventy-seven thousand, two hundred seven".