80725503785 has 4 divisors (see below), whose sum is σ = 96870604548. Its totient is φ = 64580403024.

The previous prime is 80725503751. The next prime is 80725503821. The reversal of 80725503785 is 58730552708.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34943198761 + 45782305024 = 186931^2 + 213968^2 .

It is a cyclic number.

It is not a de Polignac number, because 80725503785 - 2⁶ = 80725503721 is a prime.

It is a super-2 number, since 2×80725503785² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8072550374 + ... + 8072550383.

It is an arithmetic number, because the mean of its divisors is an integer number (24217651137).

Almost surely, 2^80725503785 is an apocalyptic number.

It is an amenable number.

80725503785 is a deficient number, since it is larger than the sum of its proper divisors (16145100763).

80725503785 is a wasteful number, since it uses less digits than its factorization.

80725503785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16145100762.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 80725503785 in words is "eighty billion, seven hundred twenty-five million, five hundred three thousand, seven hundred eighty-five".