38890820663 has 2 divisors, whose sum is σ = 38890820664. Its totient is φ = 38890820662.

The previous prime is 38890820557. The next prime is 38890820669. The reversal of 38890820663 is 36602809883.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38890820663 - 2¹⁴ = 38890804279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38890820669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19445410331 + 19445410332.

It is an arithmetic number, because the mean of its divisors is an integer number (19445410332).

Almost surely, 2^38890820663 is an apocalyptic number.

38890820663 is a deficient number, since it is larger than the sum of its proper divisors (1).

38890820663 is an equidigital number, since it uses as much as digits as its factorization.

38890820663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 38890820663 in words is "thirty-eight billion, eight hundred ninety million, eight hundred twenty thousand, six hundred sixty-three".