39161688541 has 4 divisors (see below), whose sum is σ = 39163016284. Its totient is φ = 39160360800.

The previous prime is 39161688493. The next prime is 39161688593. The reversal of 39161688541 is 14588616193.

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 6503777316 + 32657911225 = 80646^2 + 180715^2 .

It is a cyclic number.

It is not a de Polignac number, because 39161688541 - 2²¹ = 39159591389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39161688941) 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, 618600 + ... + 678961.

It is an arithmetic number, because the mean of its divisors is an integer number (9790754071).

Almost surely, 2^39161688541 is an apocalyptic number.

It is an amenable number.

39161688541 is a deficient number, since it is larger than the sum of its proper divisors (1327743).

39161688541 is a wasteful number, since it uses less digits than its factorization.

39161688541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327742.

The product of its digits is 1244160, while the sum is 52.

The spelling of 39161688541 in words is "thirty-nine billion, one hundred sixty-one million, six hundred eighty-eight thousand, five hundred forty-one".