155120511353409 has 12 divisors (see below), whose sum is σ = 256071955250176. Its totient is φ = 88640292201912.

The previous prime is 155120511353377. The next prime is 155120511353417. The reversal of 155120511353409 is 904353115021551.

155120511353409 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 205 + 1 + 1 + 35 + 3 + 409 = 666.

It is not a de Polignac number, because 155120511353409 - 2⁵ = 155120511353377 is a prime.

It is a super-3 number, since 3×155120511353409³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155120511353419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1231115169409 + ... + 1231115169534.

Almost surely, 2^{155120511353409} is an apocalyptic number.

It is an amenable number.

155120511353409 is a deficient number, since it is larger than the sum of its proper divisors (100951443896767).

155120511353409 is a wasteful number, since it uses less digits than its factorization.

155120511353409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462230338956 (or 2462230338953 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 45.

The spelling of 155120511353409 in words is "one hundred fifty-five trillion, one hundred twenty billion, five hundred eleven million, three hundred fifty-three thousand, four hundred nine".