513566402138 has 16 divisors (see below), whose sum is σ = 805212515520. Its totient is φ = 245200270656.

The previous prime is 513566402131. The next prime is 513566402189. The reversal of 513566402138 is 831204665315.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (513566402131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9482783 + ... + 9536786.

It is an arithmetic number, because the mean of its divisors is an integer number (50325782220).

Almost surely, 2^513566402138 is an apocalyptic number.

513566402138 is a deficient number, since it is larger than the sum of its proper divisors (291646113382).

513566402138 is a wasteful number, since it uses less digits than its factorization.

513566402138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19020181.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 513566402138 in words is "five hundred thirteen billion, five hundred sixty-six million, four hundred two thousand, one hundred thirty-eight".