146138905225 has 12 divisors (see below), whose sum is σ = 181218136540. Its totient is φ = 116907321600.

The previous prime is 146138905201. The next prime is 146138905229. The reversal of 146138905225 is 522509831641.

It can be written as a sum of positive squares in 6 ways, for example, as 2309859721 + 143829045504 = 48061^2 + 379248^2 .

It is not a de Polignac number, because 146138905225 - 2⁹ = 146138904713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146138905229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 888445 + ... + 1040005.

Almost surely, 2^146138905225 is an apocalyptic number.

It is an amenable number.

146138905225 is a deficient number, since it is larger than the sum of its proper divisors (35079231315).

146138905225 is a wasteful number, since it uses less digits than its factorization.

146138905225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190140 (or 190135 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 146138905225 in words is "one hundred forty-six billion, one hundred thirty-eight million, nine hundred five thousand, two hundred twenty-five".