38911964775 has 24 divisors (see below), whose sum is σ = 64340097744. Its totient is φ = 20751225600.

The previous prime is 38911964771. The next prime is 38911964779. The reversal of 38911964775 is 57746911983.

It is an interprime number because it is at equal distance from previous prime (38911964771) and next prime (38911964779).

It is not a de Polignac number, because 38911964775 - 2² = 38911964771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38911964771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1679067 + ... + 1702083.

It is an arithmetic number, because the mean of its divisors is an integer number (2680837406).

Almost surely, 2^38911964775 is an apocalyptic number.

38911964775 is a deficient number, since it is larger than the sum of its proper divisors (25428132969).

38911964775 is a wasteful number, since it uses less digits than its factorization.

38911964775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45571 (or 45566 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 60.

The spelling of 38911964775 in words is "thirty-eight billion, nine hundred eleven million, nine hundred sixty-four thousand, seven hundred seventy-five".