38427135921645 has 16 divisors (see below), whose sum is σ = 61523576503872. Its totient is φ = 20481086148480.

The previous prime is 38427135921623. The next prime is 38427135921689. The reversal of 38427135921645 is 54612953172483.

It is not a de Polignac number, because 38427135921645 - 2¹⁸ = 38427135659501 is a prime.

It is a super-3 number, since 3×38427135921645³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836622712 + ... + 836668641.

It is an arithmetic number, because the mean of its divisors is an integer number (3845223531492).

Almost surely, 2^{38427135921645} is an apocalyptic number.

It is an amenable number.

38427135921645 is a deficient number, since it is larger than the sum of its proper divisors (23096440582227).

38427135921645 is a wasteful number, since it uses less digits than its factorization.

38427135921645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673292892.

The product of its digits is 43545600, while the sum is 60.

The spelling of 38427135921645 in words is "thirty-eight trillion, four hundred twenty-seven billion, one hundred thirty-five million, nine hundred twenty-one thousand, six hundred forty-five".