15411788261 has 2 divisors, whose sum is σ = 15411788262. Its totient is φ = 15411788260.

The previous prime is 15411788257. The next prime is 15411788317. The reversal of 15411788261 is 16288711451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14017139236 + 1394649025 = 118394^2 + 37345^2 .

It is an emirp because it is prime and its reverse (16288711451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15411788261 - 2² = 15411788257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15411788461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7705894130 + 7705894131.

It is an arithmetic number, because the mean of its divisors is an integer number (7705894131).

Almost surely, 2^15411788261 is an apocalyptic number.

It is an amenable number.

15411788261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15411788261 is an equidigital number, since it uses as much as digits as its factorization.

15411788261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 44.

The spelling of 15411788261 in words is "fifteen billion, four hundred eleven million, seven hundred eighty-eight thousand, two hundred sixty-one".