38923378728145 has 8 divisors (see below), whose sum is σ = 46855398496104. Its totient is φ = 31040473634304.

The previous prime is 38923378728139. The next prime is 38923378728181. The reversal of 38923378728145 is 54182787332983.

It can be written as a sum of positive squares in 4 ways, for example, as 156865899969 + 38766512828176 = 396063^2 + 6226276^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38923378728145 - 2³⁹ = 38373622914257 is a prime.

It is a super-2 number, since 2×38923378728145² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12278666784 + ... + 12278669953.

It is an arithmetic number, because the mean of its divisors is an integer number (5856924812013).

Almost surely, 2^{38923378728145} is an apocalyptic number.

It is an amenable number.

38923378728145 is a deficient number, since it is larger than the sum of its proper divisors (7932019767959).

38923378728145 is a wasteful number, since it uses less digits than its factorization.

38923378728145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24557337059.

The product of its digits is 487710720, while the sum is 70.

The spelling of 38923378728145 in words is "thirty-eight trillion, nine hundred twenty-three billion, three hundred seventy-eight million, seven hundred twenty-eight thousand, one hundred forty-five".