155535148561 has 8 divisors (see below), whose sum is σ = 167508283880. Its totient is φ = 143563283712.

The previous prime is 155535148471. The next prime is 155535148609. The reversal of 155535148561 is 165841535551.

It can be written as a sum of positive squares in 4 ways, for example, as 4277160000 + 151257988561 = 65400^2 + 388919^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 155535148561 - 2⁹ = 155535148049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155535148361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55320 + ... + 560473.

It is an arithmetic number, because the mean of its divisors is an integer number (20938535485).

Almost surely, 2^155535148561 is an apocalyptic number.

It is an amenable number.

155535148561 is a deficient number, since it is larger than the sum of its proper divisors (11973135319).

155535148561 is a wasteful number, since it uses less digits than its factorization.

155535148561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635235.

The product of its digits is 1800000, while the sum is 49.

The spelling of 155535148561 in words is "one hundred fifty-five billion, five hundred thirty-five million, one hundred forty-eight thousand, five hundred sixty-one".