38394816653 has 2 divisors, whose sum is σ = 38394816654. Its totient is φ = 38394816652.

The previous prime is 38394816589. The next prime is 38394816701. The reversal of 38394816653 is 35661849383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36061250404 + 2333566249 = 189898^2 + 48307^2 .

It is an emirp because it is prime and its reverse (35661849383) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38394816653 - 2⁶ = 38394816589 is a prime.

It is a super-2 number, since 2×38394816653² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38394818653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19197408326 + 19197408327.

It is an arithmetic number, because the mean of its divisors is an integer number (19197408327).

Almost surely, 2^38394816653 is an apocalyptic number.

It is an amenable number.

38394816653 is a deficient number, since it is larger than the sum of its proper divisors (1).

38394816653 is an equidigital number, since it uses as much as digits as its factorization.

38394816653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11197440, while the sum is 56.

The spelling of 38394816653 in words is "thirty-eight billion, three hundred ninety-four million, eight hundred sixteen thousand, six hundred fifty-three".