39869993004361 has 27 divisors (see below), whose sum is σ = 43417125056487. Its totient is φ = 36595987699440.

The previous prime is 39869993004349. The next prime is 39869993004377. The reversal of 39869993004361 is 16340039996893.

The square root of 39869993004361 is 6314269.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5897927959225 + 33972065045136 = 2428565^2 + 5828556^2 .

It is a de Polignac number, because none of the positive numbers 2^k-39869993004361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39869993004301) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15678328656 + ... + 15678331198.

Almost surely, 2^{39869993004361} is an apocalyptic number.

39869993004361 is the 6314269-th square number.

39869993004361 is the 3157135-th centered octagonal number.

It is an amenable number.

39869993004361 is a deficient number, since it is larger than the sum of its proper divisors (3547132052126).

39869993004361 is an frugal number, since it uses more digits than its factorization.

39869993004361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5494 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 204073344, while the sum is 70.

The spelling of 39869993004361 in words is "thirty-nine trillion, eight hundred sixty-nine billion, nine hundred ninety-three million, four thousand, three hundred sixty-one".