155565516001 has 24 divisors (see below), whose sum is σ = 188891262144. Its totient is φ = 127504349280.

The previous prime is 155565515983. The next prime is 155565516011. The reversal of 155565516001 is 100615565551.

It is not a de Polignac number, because 155565516001 - 2⁷ = 155565515873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155565516011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3880606 + ... + 3920488.

It is an arithmetic number, because the mean of its divisors is an integer number (7870469256).

Almost surely, 2^155565516001 is an apocalyptic number.

It is an amenable number.

155565516001 is a deficient number, since it is larger than the sum of its proper divisors (33325746143).

155565516001 is a wasteful number, since it uses less digits than its factorization.

155565516001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43381 (or 43374 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 155565516001 in words is "one hundred fifty-five billion, five hundred sixty-five million, five hundred sixteen thousand, one".