513894428541 has 56 divisors (see below), whose sum is σ = 831896596440. Its totient is φ = 315427499136.

The previous prime is 513894428519. The next prime is 513894428543. The reversal of 513894428541 is 145824498315.

513894428541 is a `hidden beast` number, since 5 + 1 + 3 + 8 + 94 + 4 + 2 + 8 + 541 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4655196441 + 509239232100 = 68229^2 + 713610^2 .

It is not a de Polignac number, because 513894428541 - 2⁹ = 513894428029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513894428543) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3616855 + ... + 3756251.

It is an arithmetic number, because the mean of its divisors is an integer number (14855296365).

Almost surely, 2^513894428541 is an apocalyptic number.

It is an amenable number.

513894428541 is a deficient number, since it is larger than the sum of its proper divisors (318002167899).

513894428541 is a wasteful number, since it uses less digits than its factorization.

513894428541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139817 (or 139802 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The spelling of 513894428541 in words is "five hundred thirteen billion, eight hundred ninety-four million, four hundred twenty-eight thousand, five hundred forty-one".