38721078342673 has 4 divisors (see below), whose sum is σ = 38737506464820. Its totient is φ = 38704650220528.

The previous prime is 38721078342601. The next prime is 38721078342757. The reversal of 38721078342673 is 37624387012783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13483084612624 + 25237993730049 = 3671932^2 + 5023743^2 .

It is a cyclic number.

It is not a de Polignac number, because 38721078342673 - 2¹³ = 38721078334481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38721078372673) 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, 8214057538 + ... + 8214062251.

It is an arithmetic number, because the mean of its divisors is an integer number (9684376616205).

Almost surely, 2^{38721078342673} is an apocalyptic number.

It is an amenable number.

38721078342673 is a deficient number, since it is larger than the sum of its proper divisors (16428122147).

38721078342673 is a wasteful number, since it uses less digits than its factorization.

38721078342673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16428122146.

The product of its (nonzero) digits is 56899584, while the sum is 61.

The spelling of 38721078342673 in words is "thirty-eight trillion, seven hundred twenty-one billion, seventy-eight million, three hundred forty-two thousand, six hundred seventy-three".