15200720506 has 4 divisors (see below), whose sum is σ = 22801080762. Its totient is φ = 7600360252.

The previous prime is 15200720503. The next prime is 15200720543. The reversal of 15200720506 is 60502700251.

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

It can be written as a sum of positive squares in only one way, i.e., 12026412225 + 3174308281 = 109665^2 + 56341^2 .

It is not an unprimeable number, because it can be changed into a prime (15200720503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3800180125 + ... + 3800180128.

Almost surely, 2^15200720506 is an apocalyptic number.

15200720506 is a deficient number, since it is larger than the sum of its proper divisors (7600360256).

15200720506 is an equidigital number, since it uses as much as digits as its factorization.

15200720506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7600360255.

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 15200720506 in words is "fifteen billion, two hundred million, seven hundred twenty thousand, five hundred six".