80747656 has 24 divisors (see below), whose sum is σ = 166418910. Its totient is φ = 36703040.

The previous prime is 80747651. The next prime is 80747659. The reversal of 80747656 is 65674708.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 1359556 = 8910^2 + 1166^2 .

It is not an unprimeable number, because it can be changed into a prime (80747651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40741 + ... + 42676.

Almost surely, 2^80747656 is an apocalyptic number.

It is an amenable number.

80747656 is an abundant number, since it is smaller than the sum of its proper divisors (85671254).

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

80747656 is a wasteful number, since it uses less digits than its factorization.

80747656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83445 (or 83430 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 80747656 is about 8985.9699532104. The cubic root of 80747656 is about 432.2250913161.

The spelling of 80747656 in words is "eighty million, seven hundred forty-seven thousand, six hundred fifty-six".