80649759 has 8 divisors (see below), whose sum is σ = 107614080. Its totient is φ = 53725976.

The previous prime is 80649733. The next prime is 80649769. The reversal of 80649759 is 95794608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80649759 - 2⁵ = 80649727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80649769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5139 + ... + 13700.

It is an arithmetic number, because the mean of its divisors is an integer number (13451760).

Almost surely, 2^80649759 is an apocalyptic number.

80649759 is a deficient number, since it is larger than the sum of its proper divisors (26964321).

80649759 is a wasteful number, since it uses less digits than its factorization.

80649759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20269.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 80649759 is about 8980.5210873312. The cubic root of 80649759 is about 432.0503467128.

The spelling of 80649759 in words is "eighty million, six hundred forty-nine thousand, seven hundred fifty-nine".