80640550 has 24 divisors (see below), whose sum is σ = 151403256. Its totient is φ = 31952640.

The previous prime is 80640499. The next prime is 80640569. The reversal of 80640550 is 5504608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2187 + ... + 12886.

It is an arithmetic number, because the mean of its divisors is an integer number (6308469).

Almost surely, 2^80640550 is an apocalyptic number.

80640550 is a deficient number, since it is larger than the sum of its proper divisors (70762706).

80640550 is a wasteful number, since it uses less digits than its factorization.

80640550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15192 (or 15187 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 80640550 is about 8980.0083518892. The cubic root of 80640550 is about 432.0339015176.

The spelling of 80640550 in words is "eighty million, six hundred forty thousand, five hundred fifty".