2561435046 has 48 divisors (see below), whose sum is σ = 5705676288. Its totient is φ = 830070000.

The previous prime is 2561435021. The next prime is 2561435053. The reversal of 2561435046 is 6405341652.

2561435046 is a `hidden beast` number, since 2 + 5 + 6 + 143 + 504 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2561435046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117721 + ... + 137771.

It is an arithmetic number, because the mean of its divisors is an integer number (118868256).

Almost surely, 2^2561435046 is an apocalyptic number.

2561435046 is an abundant number, since it is smaller than the sum of its proper divisors (3144241242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561435046 is a wasteful number, since it uses less digits than its factorization.

2561435046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20257 (or 20254 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2561435046 is about 50610.6218693270. The cubic root of 2561435046 is about 1368.2363235667.

Adding to 2561435046 its reverse (6405341652), we get a palindrome (8966776698).

The spelling of 2561435046 in words is "two billion, five hundred sixty-one million, four hundred thirty-five thousand, forty-six".