5145123555 has 48 divisors (see below), whose sum is σ = 10477355616. Its totient is φ = 2302709760.

The previous prime is 5145123551. The next prime is 5145123611. The reversal of 5145123555 is 5553215415.

5145123555 is a `hidden beast` number, since 51 + 4 + 51 + 2 + 3 + 555 = 666.

It is not a de Polignac number, because 5145123555 - 2² = 5145123551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5145123551) 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, 393342 + ... + 406211.

It is an arithmetic number, because the mean of its divisors is an integer number (218278242).

Almost surely, 2^5145123555 is an apocalyptic number.

5145123555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5145123555 is an abundant number, since it is smaller than the sum of its proper divisors (5332232061).

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

5145123555 is a wasteful number, since it uses less digits than its factorization.

5145123555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799588 (or 799585 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 5145123555 is about 71729.5166232145. The cubic root of 5145123555 is about 1726.3622710968.

The spelling of 5145123555 in words is "five billion, one hundred forty-five million, one hundred twenty-three thousand, five hundred fifty-five".