80955613729 has 3 divisors (see below), whose sum is σ = 80955898257. Its totient is φ = 80955329202.

The previous prime is 80955613727. The next prime is 80955613733. The reversal of 80955613729 is 92731655908.

The square root of 80955613729 is 284527.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 80955613729 - 2¹ = 80955613727 is a prime.

It is a super-2 number, since 2×80955613729² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80955613729.

It is not an unprimeable number, because it can be changed into a prime (80955613727) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 142264 + ... + 426790.

It is an arithmetic number, because the mean of its divisors is an integer number (26985299419).

Almost surely, 2^80955613729 is an apocalyptic number.

80955613729 is the 284527-th square number.

80955613729 is the 142264-th centered octagonal number.

It is an amenable number.

80955613729 is a deficient number, since it is larger than the sum of its proper divisors (284528).

80955613729 is an frugal number, since it uses more digits than its factorization.

80955613729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569054 (or 284527 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 80955613729 in words is "eighty billion, nine hundred fifty-five million, six hundred thirteen thousand, seven hundred twenty-nine".