135126887761 has 4 divisors (see below), whose sum is σ = 136977941092. Its totient is φ = 133275834432.

The previous prime is 135126887729. The next prime is 135126887773. The reversal of 135126887761 is 167788621531.

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 67726939536 + 67399948225 = 260244^2 + 259615^2 .

It is a cyclic number.

It is not a de Polignac number, because 135126887761 - 2⁵ = 135126887729 is a prime.

It is a super-3 number, since 3×135126887761³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135126897761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925526556 + ... + 925526701.

It is an arithmetic number, because the mean of its divisors is an integer number (34244485273).

Almost surely, 2^135126887761 is an apocalyptic number.

It is an amenable number.

135126887761 is a deficient number, since it is larger than the sum of its proper divisors (1851053331).

135126887761 is an equidigital number, since it uses as much as digits as its factorization.

135126887761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851053330.

The product of its digits is 3386880, while the sum is 55.

The spelling of 135126887761 in words is "one hundred thirty-five billion, one hundred twenty-six million, eight hundred eighty-seven thousand, seven hundred sixty-one".