38717273405845 has 16 divisors (see below), whose sum is σ = 48063207654000. Its totient is φ = 29905516146688.

The previous prime is 38717273405813. The next prime is 38717273405873. The reversal of 38717273405845 is 54850437271783.

It can be written as a sum of positive squares in 8 ways, for example, as 1776721045969 + 36940552359876 = 1332937^2 + 6077874^2 .

It is a cyclic number.

It is not a de Polignac number, because 38717273405845 - 2⁵ = 38717273405813 is a prime.

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, 18270351 + ... + 20279059.

It is an arithmetic number, because the mean of its divisors is an integer number (3003950478375).

Almost surely, 2^{38717273405845} is an apocalyptic number.

It is an amenable number.

38717273405845 is a deficient number, since it is larger than the sum of its proper divisors (9345934248155).

38717273405845 is a wasteful number, since it uses less digits than its factorization.

38717273405845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141672.

The product of its (nonzero) digits is 158054400, while the sum is 64.

The spelling of 38717273405845 in words is "thirty-eight trillion, seven hundred seventeen billion, two hundred seventy-three million, four hundred five thousand, eight hundred forty-five".