15253515140261 has 4 divisors (see below), whose sum is σ = 15665772306252. Its totient is φ = 14841257974272.

The previous prime is 15253515140257. The next prime is 15253515140287. The reversal of 15253515140261 is 16204151535251.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13896567396100 + 1356947744161 = 3727810^2 + 1164881^2 .

It is a cyclic number.

It is not a de Polignac number, because 15253515140261 - 2² = 15253515140257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15253515140761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206128582940 + ... + 206128583013.

It is an arithmetic number, because the mean of its divisors is an integer number (3916443076563).

Almost surely, 2^{15253515140261} is an apocalyptic number.

It is an amenable number.

15253515140261 is a deficient number, since it is larger than the sum of its proper divisors (412257165991).

15253515140261 is an equidigital number, since it uses as much as digits as its factorization.

15253515140261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412257165990.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 15253515140261 in words is "fifteen trillion, two hundred fifty-three billion, five hundred fifteen million, one hundred forty thousand, two hundred sixty-one".