80260901721 has 96 divisors (see below), whose sum is σ = 164814144768. Its totient is φ = 36222750720.

The previous prime is 80260901717. The next prime is 80260901741. The reversal of 80260901721 is 12710906208.

It is not a de Polignac number, because 80260901721 - 2² = 80260901717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80260901741) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 108876 + ... + 415181.

It is an arithmetic number, because the mean of its divisors is an integer number (1716814008).

Almost surely, 2^80260901721 is an apocalyptic number.

It is an amenable number.

80260901721 is an abundant number, since it is smaller than the sum of its proper divisors (84553243047).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80260901721 is a wasteful number, since it uses less digits than its factorization.

80260901721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524111 (or 524108 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 80260901721 in words is "eighty billion, two hundred sixty million, nine hundred one thousand, seven hundred twenty-one".