1138618705646 has 8 divisors (see below), whose sum is σ = 1763022512064. Its totient is φ = 550944534960.

The previous prime is 1138618705607. The next prime is 1138618705649. The reversal of 1138618705646 is 6465078168311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1138618705591 and 1138618705600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138618705649) 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, 9182408855 + ... + 9182408978.

It is an arithmetic number, because the mean of its divisors is an integer number (220377814008).

Almost surely, 2^{1138618705646} is an apocalyptic number.

1138618705646 is a deficient number, since it is larger than the sum of its proper divisors (624403806418).

1138618705646 is a wasteful number, since it uses less digits than its factorization.

1138618705646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18364817866.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 1138618705646 in words is "one trillion, one hundred thirty-eight billion, six hundred eighteen million, seven hundred five thousand, six hundred forty-six".