80749515 has 64 divisors (see below), whose sum is σ = 162496512. Its totient is φ = 33264000.

The previous prime is 80749499. The next prime is 80749519. The reversal of 80749515 is 51594708.

It is not a de Polignac number, because 80749515 - 2⁴ = 80749499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80749519) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174174 + ... + 174636.

It is an arithmetic number, because the mean of its divisors is an integer number (2539008).

Almost surely, 2^80749515 is an apocalyptic number.

80749515 is an abundant number, since it is smaller than the sum of its proper divisors (81746997).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80749515 is a wasteful number, since it uses less digits than its factorization.

80749515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 80749515 is about 8986.0733916433. The cubic root of 80749515 is about 432.2284082350.

The spelling of 80749515 in words is "eighty million, seven hundred forty-nine thousand, five hundred fifteen".