2561331652 has 24 divisors (see below), whose sum is σ = 4896017280. Its totient is φ = 1162764960.

The previous prime is 2561331629. The next prime is 2561331667.

2561331652 is nontrivially palindromic in base 10.

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, 1452 + ... + 71587.

It is an arithmetic number, because the mean of its divisors is an integer number (204000720).

Almost surely, 2^2561331652 is an apocalyptic number.

2561331652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2561331652 is a deficient number, since it is larger than the sum of its proper divisors (2334685628).

2561331652 is a wasteful number, since it uses less digits than its factorization.

2561331652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73851 (or 73849 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 2561331652 is about 50609.6003936012. The cubic root of 2561331652 is about 1368.2179134011.

The spelling of 2561331652 in words is "two billion, five hundred sixty-one million, three hundred thirty-one thousand, six hundred fifty-two".