38719168661 has 4 divisors (see below), whose sum is σ = 39209284800. Its totient is φ = 38229052524.

The previous prime is 38719168651. The next prime is 38719168673. The reversal of 38719168661 is 16686191783.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16686191783 = 1291 ⋅12925013.

It is a cyclic number.

It is not a de Polignac number, because 38719168661 - 2³⁴ = 21539299477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38719168597 and 38719168606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38719168651) 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, 245057951 + ... + 245058108.

It is an arithmetic number, because the mean of its divisors is an integer number (9802321200).

Almost surely, 2^38719168661 is an apocalyptic number.

It is an amenable number.

38719168661 is a deficient number, since it is larger than the sum of its proper divisors (490116139).

38719168661 is an equidigital number, since it uses as much as digits as its factorization.

38719168661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490116138.

The product of its digits is 2612736, while the sum is 56.

The spelling of 38719168661 in words is "thirty-eight billion, seven hundred nineteen million, one hundred sixty-eight thousand, six hundred sixty-one".