38721380747405 has 8 divisors (see below), whose sum is σ = 46465709518584. Its totient is φ = 30977069516800.

The previous prime is 38721380747363. The next prime is 38721380747509. The reversal of 38721380747405 is 50474708312783.

It can be written as a sum of positive squares in 4 ways, for example, as 1626691074724 + 37094689672681 = 1275418^2 + 6090541^2 .

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

It is not a de Polignac number, because 38721380747405 - 2¹⁴ = 38721380731021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093745 + ... + 8867865.

It is an arithmetic number, because the mean of its divisors is an integer number (5808213689823).

Almost surely, 2^{38721380747405} is an apocalyptic number.

It is an amenable number.

38721380747405 is a deficient number, since it is larger than the sum of its proper divisors (7744328771179).

38721380747405 is an equidigital number, since it uses as much as digits as its factorization.

38721380747405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8770287.

The product of its (nonzero) digits is 31610880, while the sum is 59.

The spelling of 38721380747405 in words is "thirty-eight trillion, seven hundred twenty-one billion, three hundred eighty million, seven hundred forty-seven thousand, four hundred five".