388105137906 has 16 divisors (see below), whose sum is σ = 776608560000. Its totient is φ = 129301998608.

The previous prime is 388105137863. The next prime is 388105137923. The reversal of 388105137906 is 609731501883.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16582506 + ... + 16605893.

It is an arithmetic number, because the mean of its divisors is an integer number (48538035000).

Almost surely, 2^388105137906 is an apocalyptic number.

388105137906 is an abundant number, since it is smaller than the sum of its proper divisors (388503422094).

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

388105137906 is a wasteful number, since it uses less digits than its factorization.

388105137906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33190353.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 388105137906 in words is "three hundred eighty-eight billion, one hundred five million, one hundred thirty-seven thousand, nine hundred six".