513425385261 has 12 divisors (see below), whose sum is σ = 741635274588. Its totient is φ = 342273976704.

The previous prime is 513425385257. The next prime is 513425385287. The reversal of 513425385261 is 162583524315.

It is a happy number.

513425385261 is a `hidden beast` number, since 5 + 1 + 3 + 4 + 2 + 5 + 385 + 261 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 312603992100 + 200821393161 = 559110^2 + 448131^2 .

It is not a de Polignac number, because 513425385261 - 2² = 513425385257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513425384261) 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, 455010 + ... + 1110803.

It is an arithmetic number, because the mean of its divisors is an integer number (61802939549).

Almost surely, 2^513425385261 is an apocalyptic number.

It is an amenable number.

513425385261 is a deficient number, since it is larger than the sum of its proper divisors (228209889327).

513425385261 is a wasteful number, since it uses less digits than its factorization.

513425385261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602252 (or 1602249 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 513425385261 in words is "five hundred thirteen billion, four hundred twenty-five million, three hundred eighty-five thousand, two hundred sixty-one".