135871399131 has 32 divisors (see below), whose sum is σ = 206736763968. Its totient is φ = 78632632320.

The previous prime is 135871399109. The next prime is 135871399141. The reversal of 135871399131 is 131993178531.

It is a happy number.

It is not a de Polignac number, because 135871399131 - 2⁷ = 135871399003 is a prime.

It is a super-4 number, since 4×135871399131⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (135871399141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 766411 + ... + 926891.

It is an arithmetic number, because the mean of its divisors is an integer number (6460523874).

Almost surely, 2^135871399131 is an apocalyptic number.

135871399131 is a deficient number, since it is larger than the sum of its proper divisors (70865364837).

135871399131 is a wasteful number, since it uses less digits than its factorization.

135871399131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161791.

The product of its digits is 612360, while the sum is 51.

The spelling of 135871399131 in words is "one hundred thirty-five billion, eight hundred seventy-one million, three hundred ninety-nine thousand, one hundred thirty-one".