135188803781 has 12 divisors (see below), whose sum is σ = 147598447500. Its totient is φ = 123657262848.

The previous prime is 135188803727. The next prime is 135188803787. The reversal of 135188803781 is 187308881531.

It can be written as a sum of positive squares in 2 ways, for example, as 114958293025 + 20230510756 = 339055^2 + 142234^2 .

It is not a de Polignac number, because 135188803781 - 2¹⁸ = 135188541637 is a prime.

It is a super-2 number, since 2×135188803781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135188803787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6446156 + ... + 6467093.

It is an arithmetic number, because the mean of its divisors is an integer number (12299870625).

Almost surely, 2^135188803781 is an apocalyptic number.

It is an amenable number.

135188803781 is a deficient number, since it is larger than the sum of its proper divisors (12409643719).

135188803781 is a wasteful number, since it uses less digits than its factorization.

135188803781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12913316 (or 12913297 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 135188803781 in words is "one hundred thirty-five billion, one hundred eighty-eight million, eight hundred three thousand, seven hundred eighty-one".