38505381548537 has 4 divisors (see below), whose sum is σ = 38505997963380. Its totient is φ = 38504765133696.

The previous prime is 38505381548531. The next prime is 38505381548581. The reversal of 38505381548537 is 73584518350583.

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 27251208432361 + 11254173116176 = 5220269^2 + 3354724^2 .

It is a cyclic number.

It is not a de Polignac number, because 38505381548537 - 2⁴ = 38505381548521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38505381548531) 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, 308113712 + ... + 308238657.

It is an arithmetic number, because the mean of its divisors is an integer number (9626499490845).

Almost surely, 2^{38505381548537} is an apocalyptic number.

It is an amenable number.

38505381548537 is a deficient number, since it is larger than the sum of its proper divisors (616414843).

38505381548537 is an equidigital number, since it uses as much as digits as its factorization.

38505381548537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616414842.

The product of its (nonzero) digits is 241920000, while the sum is 65.

The spelling of 38505381548537 in words is "thirty-eight trillion, five hundred five billion, three hundred eighty-one million, five hundred forty-eight thousand, five hundred thirty-seven".