52661516245 has 24 divisors (see below), whose sum is σ = 69550662312. Its totient is φ = 38250950400.

The previous prime is 52661516191. The next prime is 52661516249. The reversal of 52661516245 is 54261516625.

It can be written as a sum of positive squares in 12 ways, for example, as 48558088881 + 4103427364 = 220359^2 + 64058^2 .

It is not a de Polignac number, because 52661516245 - 2¹¹ = 52661514197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52661516249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 459286 + ... + 562375.

It is an arithmetic number, because the mean of its divisors is an integer number (2897944263).

Almost surely, 2^52661516245 is an apocalyptic number.

It is an amenable number.

52661516245 is a deficient number, since it is larger than the sum of its proper divisors (16889146067).

52661516245 is a wasteful number, since it uses less digits than its factorization.

52661516245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021753 (or 1021740 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

The spelling of 52661516245 in words is "fifty-two billion, six hundred sixty-one million, five hundred sixteen thousand, two hundred forty-five".