38621698271818 has 4 divisors (see below), whose sum is σ = 57932547407730. Its totient is φ = 19310849135908.

The previous prime is 38621698271771. The next prime is 38621698271879. The reversal of 38621698271818 is 81817289612683.

It is a happy number.

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., 38516335059409 + 105363212409 = 6206153^2 + 324597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9655424567953 + ... + 9655424567956.

Almost surely, 2^{38621698271818} is an apocalyptic number.

38621698271818 is a deficient number, since it is larger than the sum of its proper divisors (19310849135912).

38621698271818 is a wasteful number, since it uses less digits than its factorization.

38621698271818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19310849135911.

The product of its digits is 111476736, while the sum is 70.

The spelling of 38621698271818 in words is "thirty-eight trillion, six hundred twenty-one billion, six hundred ninety-eight million, two hundred seventy-one thousand, eight hundred eighteen".