1138681637513 has 4 divisors (see below), whose sum is σ = 1301350442880. Its totient is φ = 976012832148.

The previous prime is 1138681637491. The next prime is 1138681637543. The reversal of 1138681637513 is 3157361868311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1138681637513 - 2⁸ = 1138681637257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138681637543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81334402673 + ... + 81334402686.

It is an arithmetic number, because the mean of its divisors is an integer number (325337610720).

Almost surely, 2^{1138681637513} is an apocalyptic number.

It is an amenable number.

1138681637513 is a deficient number, since it is larger than the sum of its proper divisors (162668805367).

1138681637513 is an equidigital number, since it uses as much as digits as its factorization.

1138681637513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162668805366.

The product of its digits is 2177280, while the sum is 53.

The spelling of 1138681637513 in words is "one trillion, one hundred thirty-eight billion, six hundred eighty-one million, six hundred thirty-seven thousand, five hundred thirteen".