135540145044261 has 6 divisors (see below), whose sum is σ = 195780209508390. Its totient is φ = 90360096696168.

The previous prime is 135540145044233. The next prime is 135540145044277. The reversal of 135540145044261 is 162440541045531.

135540145044261 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 4 + 0 + 145 + 0 + 442 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 98261720417025 + 37278424627236 = 9912705^2 + 6105606^2 .

It is not a de Polignac number, because 135540145044261 - 2⁷ = 135540145044133 is a prime.

It is a super-2 number, since 2×135540145044261² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135540145044221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7530008058006 + ... + 7530008058023.

It is an arithmetic number, because the mean of its divisors is an integer number (32630034918065).

Almost surely, 2^{135540145044261} is an apocalyptic number.

It is an amenable number.

135540145044261 is a deficient number, since it is larger than the sum of its proper divisors (60240064464129).

135540145044261 is a wasteful number, since it uses less digits than its factorization.

135540145044261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15060016116035 (or 15060016116032 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

Adding to 135540145044261 its reverse (162440541045531), we get a palindrome (297980686089792).

The spelling of 135540145044261 in words is "one hundred thirty-five trillion, five hundred forty billion, one hundred forty-five million, forty-four thousand, two hundred sixty-one".