80161381720 has 64 divisors (see below), whose sum is σ = 206164465920. Its totient is φ = 27479209344.

The previous prime is 80161381717. The next prime is 80161381723. The reversal of 80161381720 is 2718316108.

It is an interprime number because it is at equal distance from previous prime (80161381717) and next prime (80161381723).

It is a self number, because there is not a number n which added to its sum of digits gives 80161381720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80161381723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1883799 + ... + 1925881.

It is an arithmetic number, because the mean of its divisors is an integer number (3221319780).

Almost surely, 2^80161381720 is an apocalyptic number.

It is an amenable number.

80161381720 is an abundant number, since it is smaller than the sum of its proper divisors (126003084200).

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

80161381720 is a wasteful number, since it uses less digits than its factorization.

80161381720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48904 (or 48900 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

Adding to 80161381720 its reverse (2718316108), we get a palindrome (82879697828).

The spelling of 80161381720 in words is "eighty billion, one hundred sixty-one million, three hundred eighty-one thousand, seven hundred twenty".