1186640738617 has 2 divisors, whose sum is σ = 1186640738618. Its totient is φ = 1186640738616.

The previous prime is 1186640738573. The next prime is 1186640738663. The reversal of 1186640738617 is 7168370466811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1042708519161 + 143932219456 = 1021131^2 + 379384^2 .

It is a cyclic number.

It is not a de Polignac number, because 1186640738617 - 2¹⁵ = 1186640705849 is a prime.

It is a super-3 number, since 3×1186640738617³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1186640738417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593320369308 + 593320369309.

It is an arithmetic number, because the mean of its divisors is an integer number (593320369309).

Almost surely, 2^{1186640738617} is an apocalyptic number.

It is an amenable number.

1186640738617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1186640738617 is an equidigital number, since it uses as much as digits as its factorization.

1186640738617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 1186640738617 in words is "one trillion, one hundred eighty-six billion, six hundred forty million, seven hundred thirty-eight thousand, six hundred seventeen".