1537512900145 has 4 divisors (see below), whose sum is σ = 1845015480180. Its totient is φ = 1230010320112.

The previous prime is 1537512900139. The next prime is 1537512900181. The reversal of 1537512900145 is 5410092157351.

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 1102989354289 + 434523545856 = 1050233^2 + 659184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1537512900145 - 2³⁵ = 1503153161777 is a prime.

It is a super-2 number, since 2×1537512900145² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153751290010 + ... + 153751290019.

It is an arithmetic number, because the mean of its divisors is an integer number (461253870045).

Almost surely, 2^{1537512900145} is an apocalyptic number.

It is an amenable number.

1537512900145 is a deficient number, since it is larger than the sum of its proper divisors (307502580035).

1537512900145 is an equidigital number, since it uses as much as digits as its factorization.

1537512900145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307502580034.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 1537512900145 in words is "one trillion, five hundred thirty-seven billion, five hundred twelve million, nine hundred thousand, one hundred forty-five".