80721376 has 12 divisors (see below), whose sum is σ = 158920272. Its totient is φ = 40360672.

The previous prime is 80721373. The next prime is 80721379. The reversal of 80721376 is 67312708.

It is an interprime number because it is at equal distance from previous prime (80721373) and next prime (80721379).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80721371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1261240 + ... + 1261303.

It is an arithmetic number, because the mean of its divisors is an integer number (13243356).

Almost surely, 2^80721376 is an apocalyptic number.

It is an amenable number.

80721376 is a deficient number, since it is larger than the sum of its proper divisors (78198896).

80721376 is a wasteful number, since it uses less digits than its factorization.

80721376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522553 (or 2522545 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 80721376 is about 8984.5075546743. The cubic root of 80721376 is about 432.1781958046.

The spelling of 80721376 in words is "eighty million, seven hundred twenty-one thousand, three hundred seventy-six".