80520642 has 20 divisors (see below), whose sum is σ = 180426246. Its totient is φ = 26840160.

The previous prime is 80520637. The next prime is 80520647. The reversal of 80520642 is 24602508.

80520642 is a `hidden beast` number, since 80 + 520 + 64 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (80520637) and next prime (80520647).

It can be written as a sum of positive squares in only one way, i.e., 40717161 + 39803481 = 6381^2 + 6309^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (80520647) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 248359 + ... + 248682.

Almost surely, 2^80520642 is an apocalyptic number.

80520642 is an abundant number, since it is smaller than the sum of its proper divisors (99905604).

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

80520642 is a wasteful number, since it uses less digits than its factorization.

80520642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497055 (or 497046 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 80520642 is about 8973.3294824162. The cubic root of 80520642 is about 431.8196585219.

The spelling of 80520642 in words is "eighty million, five hundred twenty thousand, six hundred forty-two".