2515101560561 has 4 divisors (see below), whose sum is σ = 2583077278452. Its totient is φ = 2447125842672.

The previous prime is 2515101560533. The next prime is 2515101560599. The reversal of 2515101560561 is 1650651015152.

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 1089570630625 + 1425530929936 = 1043825^2 + 1193956^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515101560561 - 2³⁸ = 2240223653617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2515101560501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33987858890 + ... + 33987858963.

It is an arithmetic number, because the mean of its divisors is an integer number (645769319613).

Almost surely, 2^{2515101560561} is an apocalyptic number.

It is an amenable number.

2515101560561 is a deficient number, since it is larger than the sum of its proper divisors (67975717891).

2515101560561 is an equidigital number, since it uses as much as digits as its factorization.

2515101560561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67975717890.

The product of its (nonzero) digits is 45000, while the sum is 38.

The spelling of 2515101560561 in words is "two trillion, five hundred fifteen billion, one hundred one million, five hundred sixty thousand, five hundred sixty-one".