15220675872818 has 16 divisors (see below), whose sum is σ = 25186934560536. Its totient is φ = 6853587634560.

The previous prime is 15220675872811. The next prime is 15220675872833. The reversal of 15220675872818 is 81827857602251.

It can be written as a sum of positive squares in 4 ways, for example, as 2260942271449 + 12959733601369 = 1503643^2 + 3599963^2 .

It is a super-2 number, since 2×15220675872818² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15220675872811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7139152721 + ... + 7139154852.

Almost surely, 2^{15220675872818} is an apocalyptic number.

15220675872818 is a deficient number, since it is larger than the sum of its proper divisors (9966258687718).

15220675872818 is a wasteful number, since it uses less digits than its factorization.

15220675872818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278307629.

The product of its (nonzero) digits is 30105600, while the sum is 62.

The spelling of 15220675872818 in words is "fifteen trillion, two hundred twenty billion, six hundred seventy-five million, eight hundred seventy-two thousand, eight hundred eighteen".