1138761603649 has 4 divisors (see below), whose sum is σ = 1175495848960. Its totient is φ = 1102027358340.

The previous prime is 1138761603631. The next prime is 1138761603709. The reversal of 1138761603649 is 9463061678311.

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 1138761603649 - 2¹³ = 1138761595457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138761603649.

It is not an unprimeable number, because it can be changed into a prime (1138761673649) 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 in 3 ways as a sum of consecutive naturals, for example, 18367122609 + ... + 18367122670.

It is an arithmetic number, because the mean of its divisors is an integer number (293873962240).

Almost surely, 2^{1138761603649} is an apocalyptic number.

It is an amenable number.

1138761603649 is a deficient number, since it is larger than the sum of its proper divisors (36734245311).

1138761603649 is an equidigital number, since it uses as much as digits as its factorization.

1138761603649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36734245310.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 1138761603649 in words is "one trillion, one hundred thirty-eight billion, seven hundred sixty-one million, six hundred three thousand, six hundred forty-nine".