1513540825838 has 4 divisors (see below), whose sum is σ = 2270311238760. Its totient is φ = 756770412918.

The previous prime is 1513540825837. The next prime is 1513540825843. The reversal of 1513540825838 is 8385280453151.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1513540825838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513540825837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378385206458 + ... + 378385206461.

It is an arithmetic number, because the mean of its divisors is an integer number (567577809690).

Almost surely, 2^{1513540825838} is an apocalyptic number.

1513540825838 is a deficient number, since it is larger than the sum of its proper divisors (756770412922).

1513540825838 is an equidigital number, since it uses as much as digits as its factorization.

1513540825838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756770412921.

The product of its (nonzero) digits is 4608000, while the sum is 53.

The spelling of 1513540825838 in words is "one trillion, five hundred thirteen billion, five hundred forty million, eight hundred twenty-five thousand, eight hundred thirty-eight".