2561753983 has 4 divisors (see below), whose sum is σ = 2696583160. Its totient is φ = 2426924808.

The previous prime is 2561753969. The next prime is 2561754023. The reversal of 2561753983 is 3893571652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2561753983 - 2⁵ = 2561753951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561733983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67414560 + ... + 67414597.

It is an arithmetic number, because the mean of its divisors is an integer number (674145790).

Almost surely, 2^2561753983 is an apocalyptic number.

2561753983 is a deficient number, since it is larger than the sum of its proper divisors (134829177).

2561753983 is a wasteful number, since it uses less digits than its factorization.

2561753983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134829176.

The product of its digits is 1360800, while the sum is 49.

The square root of 2561753983 is about 50613.7726612036. The cubic root of 2561753983 is about 1368.2931098433.

The spelling of 2561753983 in words is "two billion, five hundred sixty-one million, seven hundred fifty-three thousand, nine hundred eighty-three".