2561167047 has 16 divisors (see below), whose sum is σ = 3659673600. Its totient is φ = 1589065632.

The previous prime is 2561167043. The next prime is 2561167057. The reversal of 2561167047 is 7407611652.

It is not a de Polignac number, because 2561167047 - 2² = 2561167043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2561166996 and 2561167014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561167043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499047 + ... + 504152.

It is an arithmetic number, because the mean of its divisors is an integer number (228729600).

Almost surely, 2^2561167047 is an apocalyptic number.

2561167047 is a deficient number, since it is larger than the sum of its proper divisors (1098506553).

2561167047 is a wasteful number, since it uses less digits than its factorization.

2561167047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003262.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 2561167047 is about 50607.9741443974. The cubic root of 2561167047 is about 1368.1886030832.

Adding to 2561167047 its reverse (7407611652), we get a palindrome (9968778699).

The spelling of 2561167047 in words is "two billion, five hundred sixty-one million, one hundred sixty-seven thousand, forty-seven".