155650123 has 4 divisors (see below), whose sum is σ = 155782440. Its totient is φ = 155517808.

The previous prime is 155650093. The next prime is 155650133. The reversal of 155650123 is 321056551.

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 155650123 - 2¹³ = 155641931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155650091 and 155650100.

It is not an unprimeable number, because it can be changed into a prime (155650133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64378 + ... + 66751.

It is an arithmetic number, because the mean of its divisors is an integer number (38945610).

Almost surely, 2^155650123 is an apocalyptic number.

155650123 is a deficient number, since it is larger than the sum of its proper divisors (132317).

155650123 is a wasteful number, since it uses less digits than its factorization.

155650123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132316.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 155650123 is about 12475.9818451295. The cubic root of 155650123 is about 537.9185107572.

The spelling of 155650123 in words is "one hundred fifty-five million, six hundred fifty thousand, one hundred twenty-three".