203125012152644 has 24 divisors (see below), whose sum is σ = 356897936104920. Its totient is φ = 101154275188736.

The previous prime is 203125012152617. The next prime is 203125012152679. The reversal of 203125012152644 is 446251210521302.

It can be written as a sum of positive squares in 4 ways, for example, as 173900608631044 + 29224403521600 = 13187138^2 + 5405960^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203125012152598 and 203125012152607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4762199 + ... + 20710590.

It is an arithmetic number, because the mean of its divisors is an integer number (14870747337705).

Almost surely, 2^{203125012152644} is an apocalyptic number.

It is an amenable number.

203125012152644 is a deficient number, since it is larger than the sum of its proper divisors (153772923952276).

203125012152644 is a wasteful number, since it uses less digits than its factorization.

203125012152644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25480807 (or 25480805 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 203125012152644 its reverse (446251210521302), we get a palindrome (649376222673946).

The spelling of 203125012152644 in words is "two hundred three trillion, one hundred twenty-five billion, twelve million, one hundred fifty-two thousand, six hundred forty-four".