80521456 has 20 divisors (see below), whose sum is σ = 159639832. Its totient is φ = 39324096.

The previous prime is 80521453. The next prime is 80521501. The reversal of 80521456 is 65412508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80521451) 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, 57831 + ... + 59206.

Almost surely, 2^80521456 is an apocalyptic number.

80521456 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

80521456 is a deficient number, since it is larger than the sum of its proper divisors (79118376).

80521456 is a wasteful number, since it uses less digits than its factorization.

80521456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117088 (or 117082 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 80521456 is about 8973.3748389332. The cubic root of 80521456 is about 431.8211136354.

The spelling of 80521456 in words is "eighty million, five hundred twenty-one thousand, four hundred fifty-six".