155223270317765 has 32 divisors (see below), whose sum is σ = 207073426560000. Its totient is φ = 110925384629760.

The previous prime is 155223270317683. The next prime is 155223270317777. The reversal of 155223270317765 is 567713072322551.

It is not a de Polignac number, because 155223270317765 - 2²⁴ = 155223253540549 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155223270317765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65428286 + ... + 67759184.

It is an arithmetic number, because the mean of its divisors is an integer number (6471044580000).

Almost surely, 2^{155223270317765} is an apocalyptic number.

It is an amenable number.

155223270317765 is a deficient number, since it is larger than the sum of its proper divisors (51850156242235).

155223270317765 is a wasteful number, since it uses less digits than its factorization.

155223270317765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363997.

The product of its (nonzero) digits is 18522000, while the sum is 56.

The spelling of 155223270317765 in words is "one hundred fifty-five trillion, two hundred twenty-three billion, two hundred seventy million, three hundred seventeen thousand, seven hundred sixty-five".