124404205513 has 12 divisors (see below), whose sum is σ = 145449701892. Its totient is φ = 106090887840.

The previous prime is 124404205511. The next prime is 124404205517. The reversal of 124404205513 is 315502404421.

It can be written as a sum of positive squares in 2 ways, for example, as 108775955344 + 15628250169 = 329812^2 + 125013^2 .

It is not a de Polignac number, because 124404205513 - 2¹ = 124404205511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124404205511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6434158 + ... + 6453463.

It is an arithmetic number, because the mean of its divisors is an integer number (12120808491).

Almost surely, 2^124404205513 is an apocalyptic number.

It is an amenable number.

124404205513 is a deficient number, since it is larger than the sum of its proper divisors (21045496379).

124404205513 is a wasteful number, since it uses less digits than its factorization.

124404205513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12887832 (or 12887825 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 124404205513 its reverse (315502404421), we get a palindrome (439906609934).

The spelling of 124404205513 in words is "one hundred twenty-four billion, four hundred four million, two hundred five thousand, five hundred thirteen".