39791152883821 has 8 divisors (see below), whose sum is σ = 40299486569784. Its totient is φ = 39285559541760.

The previous prime is 39791152883819. The next prime is 39791152883851. The reversal of 39791152883821 is 12838825119793.

It can be written as a sum of positive squares in 4 ways, for example, as 3966271402500 + 35824881481321 = 1991550^2 + 5985389^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 39791152883821 - 2¹ = 39791152883819 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 (39791152883851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685056750 + ... + 685114831.

It is an arithmetic number, because the mean of its divisors is an integer number (5037435821223).

Almost surely, 2^{39791152883821} is an apocalyptic number.

It is an amenable number.

39791152883821 is a deficient number, since it is larger than the sum of its proper divisors (508333685963).

39791152883821 is a wasteful number, since it uses less digits than its factorization.

39791152883821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370171951.

The product of its digits is 52254720, while the sum is 67.

The spelling of 39791152883821 in words is "thirty-nine trillion, seven hundred ninety-one billion, one hundred fifty-two million, eight hundred eighty-three thousand, eight hundred twenty-one".