53661905125 has 8 divisors (see below), whose sum is σ = 66970057752. Its totient is φ = 42929524000.

The previous prime is 53661905123. The next prime is 53661905137. The reversal of 53661905125 is 52150916635.

It can be written as a sum of positive squares in 4 ways, for example, as 1572516 + 53660332609 = 1254^2 + 231647^2 .

It is not a de Polignac number, because 53661905125 - 2¹ = 53661905123 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53661905123) by changing a digit.

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, 214647496 + ... + 214647745.

It is an arithmetic number, because the mean of its divisors is an integer number (8371257219).

Almost surely, 2^53661905125 is an apocalyptic number.

It is an amenable number.

53661905125 is a deficient number, since it is larger than the sum of its proper divisors (13308152627).

53661905125 is an equidigital number, since it uses as much as digits as its factorization.

53661905125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429295256 (or 429295246 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 43.

The spelling of 53661905125 in words is "fifty-three billion, six hundred sixty-one million, nine hundred five thousand, one hundred twenty-five".