38785971771 has 16 divisors (see below), whose sum is σ = 57880125600. Its totient is φ = 25668572544.

The previous prime is 38785971683. The next prime is 38785971793. The reversal of 38785971771 is 17717958783.

38785971771 is a `hidden beast` number, since 38 + 7 + 8 + 597 + 1 + 7 + 7 + 1 = 666.

It is not a de Polignac number, because 38785971771 - 2¹¹ = 38785969723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38785971699 and 38785971708.

It is not an unprimeable number, because it can be changed into a prime (38785971571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5239066 + ... + 5246463.

It is an arithmetic number, because the mean of its divisors is an integer number (3617507850).

Almost surely, 2^38785971771 is an apocalyptic number.

38785971771 is a deficient number, since it is larger than the sum of its proper divisors (19094153829).

38785971771 is a wasteful number, since it uses less digits than its factorization.

38785971771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10485675 (or 10485669 counting only the distinct ones).

The product of its digits is 20744640, while the sum is 63.

The spelling of 38785971771 in words is "thirty-eight billion, seven hundred eighty-five million, nine hundred seventy-one thousand, seven hundred seventy-one".