55123123530 has 16 divisors (see below), whose sum is σ = 132295496544. Its totient is φ = 14699499600.

The previous prime is 55123123493. The next prime is 55123123547. The reversal of 55123123530 is 3532132155.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1837437451 = 55123123530 / (5 + 5 + 1 + 2 + 3 + 1 + 2 + 3 + 5 + 3 + 0).

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 7 ways as a sum of consecutive naturals, for example, 918718696 + ... + 918718755.

It is an arithmetic number, because the mean of its divisors is an integer number (8268468534).

Almost surely, 2^55123123530 is an apocalyptic number.

55123123530 is an abundant number, since it is smaller than the sum of its proper divisors (77172373014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55123123530 is a wasteful number, since it uses less digits than its factorization.

55123123530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837437461.

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 55123123530 its reverse (3532132155), we get a palindrome (58655255685).

The spelling of 55123123530 in words is "fifty-five billion, one hundred twenty-three million, one hundred twenty-three thousand, five hundred thirty".