135540218257 has 8 divisors (see below), whose sum is σ = 141643218816. Its totient is φ = 129571349712.

The previous prime is 135540218197. The next prime is 135540218273. The reversal of 135540218257 is 752812045531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135540218257 - 2³⁵ = 101180479889 is a prime.

It is a super-2 number, since 2×135540218257² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135540219257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33530938 + ... + 33534979.

It is an arithmetic number, because the mean of its divisors is an integer number (17705402352).

Almost surely, 2^135540218257 is an apocalyptic number.

It is an amenable number.

135540218257 is a deficient number, since it is larger than the sum of its proper divisors (6103000559).

135540218257 is an equidigital number, since it uses as much as digits as its factorization.

135540218257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67066007.

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 135540218257 in words is "one hundred thirty-five billion, five hundred forty million, two hundred eighteen thousand, two hundred fifty-seven".