155516506505071 has 4 divisors (see below), whose sum is σ = 155516590341000. Its totient is φ = 155516422669144.

The previous prime is 155516506504967. The next prime is 155516506505081. The reversal of 155516506505071 is 170505605615551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155516506505071 - 2⁹ = 155516506504559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155516506505081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39070996 + ... + 42866953.

It is an arithmetic number, because the mean of its divisors is an integer number (38879147585250).

Almost surely, 2^{155516506505071} is an apocalyptic number.

155516506505071 is a deficient number, since it is larger than the sum of its proper divisors (83835929).

155516506505071 is an equidigital number, since it uses as much as digits as its factorization.

155516506505071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83835928.

The product of its (nonzero) digits is 3937500, while the sum is 52.

The spelling of 155516506505071 in words is "one hundred fifty-five trillion, five hundred sixteen billion, five hundred six million, five hundred five thousand, seventy-one".