155357728271 has 4 divisors (see below), whose sum is σ = 155362024272. Its totient is φ = 155353432272.

The previous prime is 155357728259. The next prime is 155357728301. The reversal of 155357728271 is 172827753551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155357728271 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 (155357728571) 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, 2093291 + ... + 2166236.

It is an arithmetic number, because the mean of its divisors is an integer number (38840506068).

Almost surely, 2^155357728271 is an apocalyptic number.

155357728271 is a deficient number, since it is larger than the sum of its proper divisors (4296001).

155357728271 is an equidigital number, since it uses as much as digits as its factorization.

155357728271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296000.

The product of its digits is 4116000, while the sum is 53.

The spelling of 155357728271 in words is "one hundred fifty-five billion, three hundred fifty-seven million, seven hundred twenty-eight thousand, two hundred seventy-one".