38517940789566 has 64 divisors (see below), whose sum is σ = 89973391411200. Its totient is φ = 10766134020096.

The previous prime is 38517940789529. The next prime is 38517940789613. The reversal of 38517940789566 is 66598704971583.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38517940789491 and 38517940789500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52889635 + ... + 53612958.

It is an arithmetic number, because the mean of its divisors is an integer number (1405834240800).

Almost surely, 2^{38517940789566} is an apocalyptic number.

38517940789566 is an abundant number, since it is smaller than the sum of its proper divisors (51455450621634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38517940789566 is a wasteful number, since it uses less digits than its factorization.

38517940789566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106502793.

The product of its (nonzero) digits is 2743372800, while the sum is 78.

The spelling of 38517940789566 in words is "thirty-eight trillion, five hundred seventeen billion, nine hundred forty million, seven hundred eighty-nine thousand, five hundred sixty-six".