155507106505567 has 4 divisors (see below), whose sum is σ = 155510529781816. Its totient is φ = 155503683229320.

The previous prime is 155507106505547. The next prime is 155507106505643. The reversal of 155507106505567 is 765505601705551.

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 155507106505567 - 2³⁵ = 155472746767199 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 (155507106505547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1711569984 + ... + 1711660837.

It is an arithmetic number, because the mean of its divisors is an integer number (38877632445454).

Almost surely, 2^{155507106505567} is an apocalyptic number.

155507106505567 is a deficient number, since it is larger than the sum of its proper divisors (3423276249).

155507106505567 is an equidigital number, since it uses as much as digits as its factorization.

155507106505567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423276248.

The product of its (nonzero) digits is 27562500, while the sum is 58.

The spelling of 155507106505567 in words is "one hundred fifty-five trillion, five hundred seven billion, one hundred six million, five hundred five thousand, five hundred sixty-seven".