155200215665 has 8 divisors (see below), whose sum is σ = 203171191488. Its totient is φ = 112872884080.

The previous prime is 155200215661. The next prime is 155200215683. The reversal of 155200215665 is 566512002551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155200215665 - 2² = 155200215661 is a prime.

It is a super-2 number, since 2×155200215665² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155200215661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1410910997 + ... + 1410911106.

It is an arithmetic number, because the mean of its divisors is an integer number (25396398936).

Almost surely, 2^155200215665 is an apocalyptic number.

It is an amenable number.

155200215665 is a deficient number, since it is larger than the sum of its proper divisors (47970975823).

155200215665 is a wasteful number, since it uses less digits than its factorization.

155200215665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821822119.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 155200215665 in words is "one hundred fifty-five billion, two hundred million, two hundred fifteen thousand, six hundred sixty-five".