2561000046 has 16 divisors (see below), whose sum is σ = 5587636608. Its totient is φ = 776060600.

The previous prime is 2561000023. The next prime is 2561000081. The reversal of 2561000046 is 6400001652.

It is a super-2 number, since 2×2561000046² = 13117442471224004232, which contains 22 as substring.

It is a congruent number.

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, 19401450 + ... + 19401581.

It is an arithmetic number, because the mean of its divisors is an integer number (349227288).

Almost surely, 2^2561000046 is an apocalyptic number.

2561000046 is an abundant number, since it is smaller than the sum of its proper divisors (3026636562).

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

2561000046 is a wasteful number, since it uses less digits than its factorization.

2561000046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38803047.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2561000046 is about 50606.3241700086. The cubic root of 2561000046 is about 1368.1588648393.

Adding to 2561000046 its reverse (6400001652), we get a palindrome (8961001698).

The spelling of 2561000046 in words is "two billion, five hundred sixty-one million, forty-six", and thus it is an aban number.