135404440142 has 4 divisors (see below), whose sum is σ = 203106660216. Its totient is φ = 67702220070.

The previous prime is 135404440123. The next prime is 135404440147. The reversal of 135404440142 is 241044404531.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 135404440099 and 135404440108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135404440147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33851110034 + ... + 33851110037.

It is an arithmetic number, because the mean of its divisors is an integer number (50776665054).

Almost surely, 2^135404440142 is an apocalyptic number.

135404440142 is a deficient number, since it is larger than the sum of its proper divisors (67702220074).

135404440142 is an equidigital number, since it uses as much as digits as its factorization.

135404440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67702220073.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 135404440142 its reverse (241044404531), we get a palindrome (376448844673).

The spelling of 135404440142 in words is "one hundred thirty-five billion, four hundred four million, four hundred forty thousand, one hundred forty-two".