2506104561 has 4 divisors (see below), whose sum is σ = 3341472752. Its totient is φ = 1670736372.

The previous prime is 2506104553. The next prime is 2506104583. The reversal of 2506104561 is 1654016052.

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 2506104561 - 2³ = 2506104553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2506104361) 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, 417684091 + ... + 417684096.

It is an arithmetic number, because the mean of its divisors is an integer number (835368188).

Almost surely, 2^2506104561 is an apocalyptic number.

It is an amenable number.

2506104561 is a deficient number, since it is larger than the sum of its proper divisors (835368191).

2506104561 is an equidigital number, since it uses as much as digits as its factorization.

2506104561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835368190.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2506104561 is about 50061.0083897638. The cubic root of 2506104561 is about 1358.3125988914.

The spelling of 2506104561 in words is "two billion, five hundred six million, one hundred four thousand, five hundred sixty-one".