1520136673 has 6 divisors (see below), whose sum is σ = 1670894162. Its totient is φ = 1381942320.

The previous prime is 1520136671. The next prime is 1520136679. The reversal of 1520136673 is 3766310251.

It can be written as a sum of positive squares in only one way, i.e., 1489033744 + 31102929 = 38588^2 + 5577^2 .

It is not a de Polignac number, because 1520136673 - 2¹ = 1520136671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1520136671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6281436 + ... + 6281677.

Almost surely, 2^1520136673 is an apocalyptic number.

It is an amenable number.

1520136673 is a deficient number, since it is larger than the sum of its proper divisors (150757489).

1520136673 is a wasteful number, since it uses less digits than its factorization.

1520136673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12563135 (or 12563124 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 1520136673 is about 38988.9301340778. The cubic root of 1520136673 is about 1149.8138761162.

The spelling of 1520136673 in words is "one billion, five hundred twenty million, one hundred thirty-six thousand, six hundred seventy-three".