80444686628 has 24 divisors (see below), whose sum is σ = 143458975800. Its totient is φ = 39456668160.

The previous prime is 80444686577. The next prime is 80444686649. The reversal of 80444686628 is 82668644408.

It can be written as a sum of positive squares in 4 ways, for example, as 35903428324 + 44541258304 = 189482^2 + 211048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344698 + ... + 1403246.

It is an arithmetic number, because the mean of its divisors is an integer number (5977457325).

Almost surely, 2^80444686628 is an apocalyptic number.

It is an amenable number.

80444686628 is a deficient number, since it is larger than the sum of its proper divisors (63014289172).

80444686628 is a wasteful number, since it uses less digits than its factorization.

80444686628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65087 (or 65085 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 56.

The spelling of 80444686628 in words is "eighty billion, four hundred forty-four million, six hundred eighty-six thousand, six hundred twenty-eight".