10115551517 has 2 divisors, whose sum is σ = 10115551518. Its totient is φ = 10115551516.

The previous prime is 10115551513. The next prime is 10115551541. The reversal of 10115551517 is 71515551101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8160231556 + 1955319961 = 90334^2 + 44219^2 .

It is a cyclic number.

It is not a de Polignac number, because 10115551517 - 2² = 10115551513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10115551513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5057775758 + 5057775759.

It is an arithmetic number, because the mean of its divisors is an integer number (5057775759).

Almost surely, 2^10115551517 is an apocalyptic number.

It is an amenable number.

10115551517 is a deficient number, since it is larger than the sum of its proper divisors (1).

10115551517 is an equidigital number, since it uses as much as digits as its factorization.

10115551517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4375, while the sum is 32.

The spelling of 10115551517 in words is "ten billion, one hundred fifteen million, five hundred fifty-one thousand, five hundred seventeen".