6503123655 has 24 divisors (see below), whose sum is σ = 12882378912. Its totient is φ = 2972856384.

The previous prime is 6503123639. The next prime is 6503123657. The reversal of 6503123655 is 5563213056.

It is not a de Polignac number, because 6503123655 - 2⁴ = 6503123639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6503123657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10322104 + ... + 10322733.

It is an arithmetic number, because the mean of its divisors is an integer number (536765788).

Almost surely, 2^6503123655 is an apocalyptic number.

6503123655 is a deficient number, since it is larger than the sum of its proper divisors (6379255257).

6503123655 is a wasteful number, since it uses less digits than its factorization.

6503123655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20644855 (or 20644852 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 6503123655 is about 80641.9472421146. The cubic root of 6503123655 is about 1866.5544812291.

The spelling of 6503123655 in words is "six billion, five hundred three million, one hundred twenty-three thousand, six hundred fifty-five".