155520103406555 has 32 divisors (see below), whose sum is σ = 201783790636800. Its totient is φ = 114666344917632.

The previous prime is 155520103406539. The next prime is 155520103406561. The reversal of 155520103406555 is 555604301025551.

It is a cyclic number.

It is not a de Polignac number, because 155520103406555 - 2⁴ = 155520103406539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22310324 + ... + 28439246.

It is an arithmetic number, because the mean of its divisors is an integer number (6305743457400).

Almost surely, 2^{155520103406555} is an apocalyptic number.

155520103406555 is a deficient number, since it is larger than the sum of its proper divisors (46263687230245).

155520103406555 is a wasteful number, since it uses less digits than its factorization.

155520103406555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6136203.

The product of its (nonzero) digits is 2250000, while the sum is 47.

The spelling of 155520103406555 in words is "one hundred fifty-five trillion, five hundred twenty billion, one hundred three million, four hundred six thousand, five hundred fifty-five".