155245042505 has 32 divisors (see below), whose sum is σ = 215448161280. Its totient is φ = 105188751360.

The previous prime is 155245042489. The next prime is 155245042523. The reversal of 155245042505 is 505240542551.

It is not a de Polignac number, because 155245042505 - 2⁴ = 155245042489 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1344665 + ... + 1455545.

It is an arithmetic number, because the mean of its divisors is an integer number (6732755040).

Almost surely, 2^155245042505 is an apocalyptic number.

It is an amenable number.

155245042505 is a deficient number, since it is larger than the sum of its proper divisors (60203118775).

155245042505 is a wasteful number, since it uses less digits than its factorization.

155245042505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111369.

The product of its (nonzero) digits is 200000, while the sum is 38.

The spelling of 155245042505 in words is "one hundred fifty-five billion, two hundred forty-five million, forty-two thousand, five hundred five".