155612362321225 has 12 divisors (see below), whose sum is σ = 195677066312640. Its totient is φ = 122736511125200.

The previous prime is 155612362321211. The next prime is 155612362321231. The reversal of 155612362321225 is 522123263216551.

It is a happy number.

It is not a de Polignac number, because 155612362321225 - 2⁴¹ = 153413339065673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43834466485 + ... + 43834470034.

It is an arithmetic number, because the mean of its divisors is an integer number (16306422192720).

Almost surely, 2^{155612362321225} is an apocalyptic number.

It is an amenable number.

155612362321225 is a deficient number, since it is larger than the sum of its proper divisors (40064703991415).

155612362321225 is an equidigital number, since it uses as much as digits as its factorization.

155612362321225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87668936600 (or 87668936595 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The spelling of 155612362321225 in words is "one hundred fifty-five trillion, six hundred twelve billion, three hundred sixty-two million, three hundred twenty-one thousand, two hundred twenty-five".