80578261 has 4 divisors (see below), whose sum is σ = 80596800. Its totient is φ = 80559724.

The previous prime is 80578229. The next prime is 80578271. The reversal of 80578261 is 16287508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80578261 - 2⁵ = 80578229 is a prime.

It is a super-2 number, since 2×80578261² = 12985712291568242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80578261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80578271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170 + ... + 12748.

It is an arithmetic number, because the mean of its divisors is an integer number (20149200).

Almost surely, 2^80578261 is an apocalyptic number.

It is an amenable number.

80578261 is a deficient number, since it is larger than the sum of its proper divisors (18539).

80578261 is a wasteful number, since it uses less digits than its factorization.

80578261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18538.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 80578261 is about 8976.5394779948. The cubic root of 80578261 is about 431.9226345368.

The spelling of 80578261 in words is "eighty million, five hundred seventy-eight thousand, two hundred sixty-one".