156645214225 has 12 divisors (see below), whose sum is σ = 194245424640. Its totient is φ = 125312714000.

The previous prime is 156645214223. The next prime is 156645214279. The reversal of 156645214225 is 522412546651.

It is a happy number.

It is not a de Polignac number, because 156645214225 - 2¹ = 156645214223 is a prime.

It is a super-2 number, since 2×156645214225² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156645214223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1232400 + ... + 1353550.

It is an arithmetic number, because the mean of its divisors is an integer number (16187118720).

Almost surely, 2^156645214225 is an apocalyptic number.

It is an amenable number.

156645214225 is a deficient number, since it is larger than the sum of its proper divisors (37600210415).

156645214225 is a wasteful number, since it uses less digits than its factorization.

156645214225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172880 (or 172875 counting only the distinct ones).

The product of its digits is 576000, while the sum is 43.

The spelling of 156645214225 in words is "one hundred fifty-six billion, six hundred forty-five million, two hundred fourteen thousand, two hundred twenty-five".