38404256545865 has 16 divisors (see below), whose sum is σ = 52840253972352. Its totient is φ = 26248567705344.

The previous prime is 38404256545843. The next prime is 38404256545913. The reversal of 38404256545865 is 56854565240483.

It is a cyclic number.

It is not a de Polignac number, because 38404256545865 - 2¹² = 38404256541769 is a prime.

It is a super-2 number, since 2×38404256545865² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1787064944 + ... + 1787086433.

It is an arithmetic number, because the mean of its divisors is an integer number (3302515873272).

Almost surely, 2^{38404256545865} is an apocalyptic number.

38404256545865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38404256545865 is a deficient number, since it is larger than the sum of its proper divisors (14435997426487).

38404256545865 is a wasteful number, since it uses less digits than its factorization.

38404256545865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574151696.

The product of its (nonzero) digits is 552960000, while the sum is 65.

The spelling of 38404256545865 in words is "thirty-eight trillion, four hundred four billion, two hundred fifty-six million, five hundred forty-five thousand, eight hundred sixty-five".