388134738511 has 4 divisors (see below), whose sum is σ = 417991256872. Its totient is φ = 358278220152.

The previous prime is 388134738491. The next prime is 388134738517. The reversal of 388134738511 is 115837431883.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 388134738511 - 2³⁵ = 353775000143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388134738517) 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, 14928259161 + ... + 14928259186.

It is an arithmetic number, because the mean of its divisors is an integer number (104497814218).

Almost surely, 2^388134738511 is an apocalyptic number.

388134738511 is a deficient number, since it is larger than the sum of its proper divisors (29856518361).

388134738511 is a wasteful number, since it uses less digits than its factorization.

388134738511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29856518360.

The product of its digits is 1935360, while the sum is 52.

The spelling of 388134738511 in words is "three hundred eighty-eight billion, one hundred thirty-four million, seven hundred thirty-eight thousand, five hundred eleven".