135618191401 has 16 divisors (see below), whose sum is σ = 169119313920. Its totient is φ = 105653454480.

The previous prime is 135618191399. The next prime is 135618191459. The reversal of 135618191401 is 104191816531.

It is a happy number.

It is not a de Polignac number, because 135618191401 - 2¹ = 135618191399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135618192401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167370 + ... + 547036.

It is an arithmetic number, because the mean of its divisors is an integer number (10569957120).

Almost surely, 2^135618191401 is an apocalyptic number.

135618191401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135618191401 is a deficient number, since it is larger than the sum of its proper divisors (33501122519).

135618191401 is a wasteful number, since it uses less digits than its factorization.

135618191401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384324.

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 135618191401 in words is "one hundred thirty-five billion, six hundred eighteen million, one hundred ninety-one thousand, four hundred one".