80723721355 has 16 divisors (see below), whose sum is σ = 97307106624. Its totient is φ = 64287095680.

The previous prime is 80723721343. The next prime is 80723721367. The reversal of 80723721355 is 55312732708.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80723721343) and next prime (80723721367).

It is not a de Polignac number, because 80723721355 - 2²⁵ = 80690166923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1168437 + ... + 1235593.

It is an arithmetic number, because the mean of its divisors is an integer number (6081694164).

Almost surely, 2^80723721355 is an apocalyptic number.

80723721355 is a deficient number, since it is larger than the sum of its proper divisors (16583385269).

80723721355 is a wasteful number, since it uses less digits than its factorization.

80723721355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68246.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 80723721355 in words is "eighty billion, seven hundred twenty-three million, seven hundred twenty-one thousand, three hundred fifty-five".