80643507 has 16 divisors (see below), whose sum is σ = 123052800. Its totient is φ = 46019232.

The previous prime is 80643503. The next prime is 80643517. The reversal of 80643507 is 70534608.

It is not a de Polignac number, because 80643507 - 2² = 80643503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80643503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16369 + ... + 20717.

It is an arithmetic number, because the mean of its divisors is an integer number (7690800).

Almost surely, 2^80643507 is an apocalyptic number.

80643507 is a deficient number, since it is larger than the sum of its proper divisors (42409293).

80643507 is a wasteful number, since it uses less digits than its factorization.

80643507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 80643507 is about 8980.1729938793. The cubic root of 80643507 is about 432.0391821885.

The spelling of 80643507 in words is "eighty million, six hundred forty-three thousand, five hundred seven".