80612737720 has 64 divisors (see below), whose sum is σ = 189406693440. Its totient is φ = 30819993600.

The previous prime is 80612737693. The next prime is 80612737721. The reversal of 80612737720 is 2773721608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80612737721) 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, 1219930 + ... + 1284310.

It is an arithmetic number, because the mean of its divisors is an integer number (2959479585).

Almost surely, 2^80612737720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80612737720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94703346720).

80612737720 is an abundant number, since it is smaller than the sum of its proper divisors (108793955720).

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

80612737720 is a wasteful number, since it uses less digits than its factorization.

80612737720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65776 (or 65772 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 80612737720 in words is "eighty billion, six hundred twelve million, seven hundred thirty-seven thousand, seven hundred twenty".