386186521642 has 4 divisors (see below), whose sum is σ = 579279782466. Its totient is φ = 193093260820.

The previous prime is 386186521639. The next prime is 386186521649. The reversal of 386186521642 is 246125681683.

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

It can be written as a sum of positive squares in only one way, i.e., 274375868481 + 111810653161 = 523809^2 + 334381^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 386186521642.

It is not an unprimeable number, because it can be changed into a prime (386186521649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96546630409 + ... + 96546630412.

Almost surely, 2^386186521642 is an apocalyptic number.

386186521642 is a deficient number, since it is larger than the sum of its proper divisors (193093260824).

386186521642 is a wasteful number, since it uses less digits than its factorization.

386186521642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193093260823.

The product of its digits is 3317760, while the sum is 52.

The spelling of 386186521642 in words is "three hundred eighty-six billion, one hundred eighty-six million, five hundred twenty-one thousand, six hundred forty-two".