1537744745 has 4 divisors (see below), whose sum is σ = 1845293700. Its totient is φ = 1230195792.

The previous prime is 1537744721. The next prime is 1537744757. The reversal of 1537744745 is 5474477351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5474477351 = 7 ⋅782068193.

It can be written as a sum of positive squares in 2 ways, for example, as 527712784 + 1010031961 = 22972^2 + 31781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1537744745 - 2²² = 1533550441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1537744745.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 153774470 + ... + 153774479.

It is an arithmetic number, because the mean of its divisors is an integer number (461323425).

Almost surely, 2^1537744745 is an apocalyptic number.

It is an amenable number.

1537744745 is a deficient number, since it is larger than the sum of its proper divisors (307548955).

1537744745 is an equidigital number, since it uses as much as digits as its factorization.

1537744745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307548954.

The product of its digits is 1646400, while the sum is 47.

The square root of 1537744745 is about 39214.0886034599. The cubic root of 1537744745 is about 1154.2363585982.

The spelling of 1537744745 in words is "one billion, five hundred thirty-seven million, seven hundred forty-four thousand, seven hundred forty-five".