73071280489 has 9 divisors (see below), whose sum is σ = 77627314821. Its totient is φ = 68768644800.

The previous prime is 73071280487. The next prime is 73071280493. The reversal of 73071280489 is 98408217037.

The square root of 73071280489 is 270317.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 51840459225 + 21230821264 = 227685^2 + 145708^2 .

It is not a de Polignac number, because 73071280489 - 2¹ = 73071280487 is a prime.

It is a super-2 number, since 2×73071280489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73071280487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4587439 + ... + 4603339.

Almost surely, 2^73071280489 is an apocalyptic number.

73071280489 is the 270317-th square number.

73071280489 is the 135159-th centered octagonal number.

It is an amenable number.

73071280489 is a deficient number, since it is larger than the sum of its proper divisors (4556034332).

73071280489 is an frugal number, since it uses more digits than its factorization.

73071280489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31836 (or 15918 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

Multiplying 73071280489 by its sum of digits (49), we get a square (3580492743961 = 1892219²).

The spelling of 73071280489 in words is "seventy-three billion, seventy-one million, two hundred eighty thousand, four hundred eighty-nine".