2513011511561 has 4 divisors (see below), whose sum is σ = 2513543595792. Its totient is φ = 2512479427332.

The previous prime is 2513011511557. The next prime is 2513011511599. The reversal of 2513011511561 is 1651151103152.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2513011511561 - 2² = 2513011511557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2513011511161) 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, 266035031 + ... + 266044476.

It is an arithmetic number, because the mean of its divisors is an integer number (628385898948).

Almost surely, 2^{2513011511561} is an apocalyptic number.

It is an amenable number.

2513011511561 is a deficient number, since it is larger than the sum of its proper divisors (532084231).

2513011511561 is an equidigital number, since it uses as much as digits as its factorization.

2513011511561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532084230.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 2513011511561 in words is "two trillion, five hundred thirteen billion, eleven million, five hundred eleven thousand, five hundred sixty-one".