1509387945073 has 4 divisors (see below), whose sum is σ = 1509498837108. Its totient is φ = 1509277053040.

The previous prime is 1509387945061. The next prime is 1509387945083. The reversal of 1509387945073 is 3705497839051.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13935330304 + 1495452614769 = 118048^2 + 1222887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1509387945073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1509387945083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55425598 + ... + 55452823.

It is an arithmetic number, because the mean of its divisors is an integer number (377374709277).

Almost surely, 2^{1509387945073} is an apocalyptic number.

It is an amenable number.

1509387945073 is a deficient number, since it is larger than the sum of its proper divisors (110892035).

1509387945073 is a wasteful number, since it uses less digits than its factorization.

1509387945073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110892034.

The product of its (nonzero) digits is 28576800, while the sum is 61.

The spelling of 1509387945073 in words is "one trillion, five hundred nine billion, three hundred eighty-seven million, nine hundred forty-five thousand, seventy-three".