2564561546 has 16 divisors (see below), whose sum is σ = 3935026176. Its totient is φ = 1253187936.

The previous prime is 2564561513. The next prime is 2564561557. The reversal of 2564561546 is 6451654652.

It is a junction number, because it is equal to n+sod(n) for n = 2564561497 and 2564561506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58331 + ... + 92366.

It is an arithmetic number, because the mean of its divisors is an integer number (245939136).

Almost surely, 2^2564561546 is an apocalyptic number.

2564561546 is a deficient number, since it is larger than the sum of its proper divisors (1370464630).

2564561546 is a wasteful number, since it uses less digits than its factorization.

2564561546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150893.

The product of its digits is 864000, while the sum is 44.

The square root of 2564561546 is about 50641.5002344915. The cubic root of 2564561546 is about 1368.7927891768.

The spelling of 2564561546 in words is "two billion, five hundred sixty-four million, five hundred sixty-one thousand, five hundred forty-six".