80636544 has 48 divisors (see below), whose sum is σ = 232043370. Its totient is φ = 26878464.

The previous prime is 80636531. The next prime is 80636557. The reversal of 80636544 is 44563608.

80636544 is a `hidden beast` number, since 80 + 6 + 36 + 544 = 666.

It is an interprime number because it is at equal distance from previous prime (80636531) and next prime (80636557).

It can be written as a sum of positive squares in only one way, i.e., 56430144 + 24206400 = 7512^2 + 4920^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80636499 and 80636508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33847 + ... + 36150.

Almost surely, 2^80636544 is an apocalyptic number.

It is an amenable number.

80636544 is an abundant number, since it is smaller than the sum of its proper divisors (151406826).

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

80636544 is a wasteful number, since it uses less digits than its factorization.

80636544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70017 (or 70002 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 80636544 is about 8979.7852981015. The cubic root of 80636544 is about 432.0267473151.

The spelling of 80636544 in words is "eighty million, six hundred thirty-six thousand, five hundred forty-four".