15228780652806 has 36 divisors (see below), whose sum is σ = 35430380050212. Its totient is φ = 4351061068704.

The previous prime is 15228780652783. The next prime is 15228780652807. The reversal of 15228780652806 is 60825608782251.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 15228780652806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15228780652807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 66798546 + ... + 67026138.

It is an arithmetic number, because the mean of its divisors is an integer number (984177223617).

Almost surely, 2^{15228780652806} is an apocalyptic number.

15228780652806 is an abundant number, since it is smaller than the sum of its proper divisors (20201599397406).

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

15228780652806 is an frugal number, since it uses more digits than its factorization.

15228780652806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455205 (or 227605 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 60.

The spelling of 15228780652806 in words is "fifteen trillion, two hundred twenty-eight billion, seven hundred eighty million, six hundred fifty-two thousand, eight hundred six".