2471159061561 has 4 divisors (see below), whose sum is σ = 3294878748752. Its totient is φ = 1647439374372.

The previous prime is 2471159061551. The next prime is 2471159061577. The reversal of 2471159061561 is 1651609511742.

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 not a de Polignac number, because 2471159061561 - 2¹⁴ = 2471159045177 is a prime.

It is a super-2 number, since 2×2471159061561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2471159061561.

It is not an unprimeable number, because it can be changed into a prime (2471159061551) 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, 411859843591 + ... + 411859843596.

It is an arithmetic number, because the mean of its divisors is an integer number (823719687188).

Almost surely, 2^{2471159061561} is an apocalyptic number.

It is an amenable number.

2471159061561 is a deficient number, since it is larger than the sum of its proper divisors (823719687191).

2471159061561 is an equidigital number, since it uses as much as digits as its factorization.

2471159061561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823719687190.

The product of its (nonzero) digits is 453600, while the sum is 48.

The spelling of 2471159061561 in words is "two trillion, four hundred seventy-one billion, one hundred fifty-nine million, sixty-one thousand, five hundred sixty-one".