135542021408 has 12 divisors (see below), whose sum is σ = 266848354710. Its totient is φ = 67771010688.

The previous prime is 135542021353. The next prime is 135542021413. The reversal of 135542021408 is 804120245531.

It can be written as a sum of positive squares in only one way, i.e., 116846381584 + 18695639824 = 341828^2 + 136732^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2117844053 + ... + 2117844116.

Almost surely, 2^135542021408 is an apocalyptic number.

It is an amenable number.

135542021408 is a deficient number, since it is larger than the sum of its proper divisors (131306333302).

135542021408 is an equidigital number, since it uses as much as digits as its factorization.

135542021408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235688179 (or 4235688171 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 135542021408 its reverse (804120245531), we get a palindrome (939662266939).

The spelling of 135542021408 in words is "one hundred thirty-five billion, five hundred forty-two million, twenty-one thousand, four hundred eight".