124040045215 has 4 divisors (see below), whose sum is σ = 148848054264. Its totient is φ = 99232036168.

The previous prime is 124040045191. The next prime is 124040045219. The reversal of 124040045215 is 512540040421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124040045215 - 2²³ = 124031656607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124040045219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12404004517 + ... + 12404004526.

It is an arithmetic number, because the mean of its divisors is an integer number (37212013566).

Almost surely, 2^124040045215 is an apocalyptic number.

124040045215 is a deficient number, since it is larger than the sum of its proper divisors (24808009049).

124040045215 is an equidigital number, since it uses as much as digits as its factorization.

124040045215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24808009048.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 124040045215 its reverse (512540040421), we get a palindrome (636580085636).

The spelling of 124040045215 in words is "one hundred twenty-four billion, forty million, forty-five thousand, two hundred fifteen".