155320140123 has 48 divisors (see below), whose sum is σ = 237649744800. Its totient is φ = 97479521280.

The previous prime is 155320140121. The next prime is 155320140137. The reversal of 155320140123 is 321041023551.

155320140123 is a `hidden beast` number, since 1 + 5 + 53 + 201 + 401 + 2 + 3 = 666.

It is not a de Polignac number, because 155320140123 - 2¹ = 155320140121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155320140121) 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 47 ways as a sum of consecutive naturals, for example, 21808003 + ... + 21815123.

It is an arithmetic number, because the mean of its divisors is an integer number (4951036350).

Almost surely, 2^155320140123 is an apocalyptic number.

155320140123 is a deficient number, since it is larger than the sum of its proper divisors (82329604677).

155320140123 is a wasteful number, since it uses less digits than its factorization.

155320140123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932 (or 7929 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 155320140123 its reverse (321041023551), we get a palindrome (476361163674).

The spelling of 155320140123 in words is "one hundred fifty-five billion, three hundred twenty million, one hundred forty thousand, one hundred twenty-three".