80137540 has 36 divisors (see below), whose sum is σ = 195766956. Its totient is φ = 27475392.

The previous prime is 80137529. The next prime is 80137571. The reversal of 80137540 is 4573108.

It can be written as a sum of positive squares in 2 ways, for example, as 46867716 + 33269824 = 6846^2 + 5768^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 80137499 and 80137508.

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, 39907 + ... + 41866.

It is an arithmetic number, because the mean of its divisors is an integer number (5437971).

Almost surely, 2^80137540 is an apocalyptic number.

It is an amenable number.

80137540 is an abundant number, since it is smaller than the sum of its proper divisors (115629416).

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

80137540 is a wasteful number, since it uses less digits than its factorization.

80137540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81796 (or 81787 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 80137540 is about 8951.9573278697. The cubic root of 80137540 is about 431.1337307503.

The spelling of 80137540 in words is "eighty million, one hundred thirty-seven thousand, five hundred forty".