155765055671 has 4 divisors (see below), whose sum is σ = 155995137672. Its totient is φ = 155534973672.

The previous prime is 155765055623. The next prime is 155765055689. The reversal of 155765055671 is 176550567551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176550567551 = 17 ⋅10385327503.

It is a cyclic number.

It is not a de Polignac number, because 155765055671 - 2¹⁰ = 155765054647 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 (155765055601) 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, 115039985 + ... + 115041338.

It is an arithmetic number, because the mean of its divisors is an integer number (38998784418).

Almost surely, 2^155765055671 is an apocalyptic number.

155765055671 is a deficient number, since it is larger than the sum of its proper divisors (230082001).

155765055671 is an equidigital number, since it uses as much as digits as its factorization.

155765055671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230082000.

The product of its (nonzero) digits is 5512500, while the sum is 53.

The spelling of 155765055671 in words is "one hundred fifty-five billion, seven hundred sixty-five million, fifty-five thousand, six hundred seventy-one".