80638745 has 16 divisors (see below), whose sum is σ = 106539840. Its totient is φ = 58104000.

The previous prime is 80638741. The next prime is 80638751. The reversal of 80638745 is 54783608.

It is a happy number.

It is not a de Polignac number, because 80638745 - 2² = 80638741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80638741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 731 + ... + 12720.

It is an arithmetic number, because the mean of its divisors is an integer number (6658740).

Almost surely, 2^80638745 is an apocalyptic number.

It is an amenable number.

80638745 is a deficient number, since it is larger than the sum of its proper divisors (25901095).

80638745 is a wasteful number, since it uses less digits than its factorization.

80638745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13576.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 80638745 is about 8979.9078503067. The cubic root of 80638745 is about 432.0306780483.

The spelling of 80638745 in words is "eighty million, six hundred thirty-eight thousand, seven hundred forty-five".