80397200261 has 24 divisors (see below), whose sum is σ = 95019583680. Its totient is φ = 67815831552.

The previous prime is 80397200251. The next prime is 80397200291. The reversal of 80397200261 is 16200279308.

It is a de Polignac number, because none of the positive numbers 2^k-80397200261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80397200231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006760 + ... + 1083678.

It is an arithmetic number, because the mean of its divisors is an integer number (3959149320).

Almost surely, 2^80397200261 is an apocalyptic number.

It is an amenable number.

80397200261 is a deficient number, since it is larger than the sum of its proper divisors (14622383419).

80397200261 is a wasteful number, since it uses less digits than its factorization.

80397200261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77273 (or 77266 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 80397200261 its reverse (16200279308), we get a palindrome (96597479569).

The spelling of 80397200261 in words is "eighty billion, three hundred ninety-seven million, two hundred thousand, two hundred sixty-one".