155205250603 has 4 divisors (see below), whose sum is σ = 167144116048. Its totient is φ = 143266385160.

The previous prime is 155205250601. The next prime is 155205250639. The reversal of 155205250603 is 306052502551.

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

It is a cyclic number.

It is not a de Polignac number, because 155205250603 - 2¹ = 155205250601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155205250601) 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 3 ways as a sum of consecutive naturals, for example, 5969432703 + ... + 5969432728.

It is an arithmetic number, because the mean of its divisors is an integer number (41786029012).

Almost surely, 2^155205250603 is an apocalyptic number.

155205250603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

155205250603 is a deficient number, since it is larger than the sum of its proper divisors (11938865445).

155205250603 is a wasteful number, since it uses less digits than its factorization.

155205250603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938865444.

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 155205250603 in words is "one hundred fifty-five billion, two hundred five million, two hundred fifty thousand, six hundred three".