80648261 has 4 divisors (see below), whose sum is σ = 81784224. Its totient is φ = 79512300.

The previous prime is 80648257. The next prime is 80648299. The reversal of 80648261 is 16284608.

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 80648261 - 2² = 80648257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80648861) 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, 567875 + ... + 568016.

It is an arithmetic number, because the mean of its divisors is an integer number (20446056).

Almost surely, 2^80648261 is an apocalyptic number.

It is an amenable number.

80648261 is a deficient number, since it is larger than the sum of its proper divisors (1135963).

80648261 is a wasteful number, since it uses less digits than its factorization.

80648261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135962.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 80648261 is about 8980.4376842112. The cubic root of 80648261 is about 432.0476717082.

The spelling of 80648261 in words is "eighty million, six hundred forty-eight thousand, two hundred sixty-one".