15541945572225 has 96 divisors (see below), whose sum is σ = 27212356297728. Its totient is φ = 7814338560000.

The previous prime is 15541945572203. The next prime is 15541945572259. The reversal of 15541945572225 is 52227554914551.

It is a happy number.

It is not a de Polignac number, because 15541945572225 - 2¹⁴ = 15541945555841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64032595 + ... + 64274855.

It is an arithmetic number, because the mean of its divisors is an integer number (283462044768).

Almost surely, 2^{15541945572225} is an apocalyptic number.

15541945572225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15541945572225 is a deficient number, since it is larger than the sum of its proper divisors (11670410725503).

15541945572225 is a wasteful number, since it uses less digits than its factorization.

15541945572225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243019 (or 243014 counting only the distinct ones).

The product of its digits is 25200000, while the sum is 57.

The spelling of 15541945572225 in words is "fifteen trillion, five hundred forty-one billion, nine hundred forty-five million, five hundred seventy-two thousand, two hundred twenty-five".