253109721559 has 2 divisors, whose sum is σ = 253109721560. Its totient is φ = 253109721558.

The previous prime is 253109721541. The next prime is 253109721629. The reversal of 253109721559 is 955127901352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253109721559 is a prime.

It is a super-3 number, since 3×253109721559³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253109721659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126554860779 + 126554860780.

It is an arithmetic number, because the mean of its divisors is an integer number (126554860780).

Almost surely, 2^253109721559 is an apocalyptic number.

253109721559 is a deficient number, since it is larger than the sum of its proper divisors (1).

253109721559 is an equidigital number, since it uses as much as digits as its factorization.

253109721559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 850500, while the sum is 49.

The spelling of 253109721559 in words is "two hundred fifty-three billion, one hundred nine million, seven hundred twenty-one thousand, five hundred fifty-nine".