38539854139047 has 4 divisors (see below), whose sum is σ = 51386472185400. Its totient is φ = 25693236092696.

The previous prime is 38539854139043. The next prime is 38539854139067. The reversal of 38539854139047 is 74093145893583.

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 38539854139047 - 2² = 38539854139043 is a prime.

It is a super-2 number, since 2×38539854139047² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38539854139043) 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, 6423309023172 + ... + 6423309023177.

It is an arithmetic number, because the mean of its divisors is an integer number (12846618046350).

Almost surely, 2^{38539854139047} is an apocalyptic number.

38539854139047 is a deficient number, since it is larger than the sum of its proper divisors (12846618046353).

38539854139047 is a wasteful number, since it uses less digits than its factorization.

38539854139047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12846618046352.

The product of its (nonzero) digits is 391910400, while the sum is 69.

The spelling of 38539854139047 in words is "thirty-eight trillion, five hundred thirty-nine billion, eight hundred fifty-four million, one hundred thirty-nine thousand, forty-seven".