38929528661 has 4 divisors (see below), whose sum is σ = 38940295212. Its totient is φ = 38918762112.

The previous prime is 38929528633. The next prime is 38929528663. The reversal of 38929528661 is 16682592983.

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 603635761 + 38325892900 = 24569^2 + 195770^2 .

It is a cyclic number.

It is not a de Polignac number, because 38929528661 - 2¹⁴ = 38929512277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38929528661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38929528663) 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, 5377850 + ... + 5385083.

It is an arithmetic number, because the mean of its divisors is an integer number (9735073803).

Almost surely, 2^38929528661 is an apocalyptic number.

It is an amenable number.

38929528661 is a deficient number, since it is larger than the sum of its proper divisors (10766551).

38929528661 is a wasteful number, since it uses less digits than its factorization.

38929528661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10766550.

The product of its digits is 11197440, while the sum is 59.

The spelling of 38929528661 in words is "thirty-eight billion, nine hundred twenty-nine million, five hundred twenty-eight thousand, six hundred sixty-one".