13145123550 has 48 divisors (see below), whose sum is σ = 35107596720. Its totient is φ = 3235722240.

The previous prime is 13145123543. The next prime is 13145123587. The reversal of 13145123550 is 5532154131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3368595 + ... + 3372494.

It is an arithmetic number, because the mean of its divisors is an integer number (731408265).

Almost surely, 2^13145123550 is an apocalyptic number.

13145123550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13145123550 is an abundant number, since it is smaller than the sum of its proper divisors (21962473170).

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

13145123550 is a wasteful number, since it uses less digits than its factorization.

13145123550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741117 (or 6741112 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 13145123550 its reverse (5532154131), we get a palindrome (18677277681).

The spelling of 13145123550 in words is "thirteen billion, one hundred forty-five million, one hundred twenty-three thousand, five hundred fifty".