80634644 has 6 divisors (see below), whose sum is σ = 141110634. Its totient is φ = 40317320.

The previous prime is 80634641. The next prime is 80634647. The reversal of 80634644 is 44643608.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80634641) and next prime (80634647).

It can be written as a sum of positive squares in only one way, i.e., 49140100 + 31494544 = 7010^2 + 5612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80634641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10079327 + ... + 10079334.

It is an arithmetic number, because the mean of its divisors is an integer number (23518439).

Almost surely, 2^80634644 is an apocalyptic number.

It is an amenable number.

80634644 is a deficient number, since it is larger than the sum of its proper divisors (60475990).

80634644 is a wasteful number, since it uses less digits than its factorization.

80634644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20158665 (or 20158663 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 80634644 is about 8979.6795043030. The cubic root of 80634644 is about 432.0233540758.

The spelling of 80634644 in words is "eighty million, six hundred thirty-four thousand, six hundred forty-four".