15939016361 has 4 divisors (see below), whose sum is σ = 16021602132. Its totient is φ = 15856430592.

The previous prime is 15939016351. The next prime is 15939016369. The reversal of 15939016361 is 16361093951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16361093951 = 43 ⋅380490557.

It can be written as a sum of positive squares in 2 ways, for example, as 10043847961 + 5895168400 = 100219^2 + 76780^2 .

It is a cyclic number.

It is not a de Polignac number, because 15939016361 - 2²⁶ = 15871907497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15939016369) 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, 41292596 + ... + 41292981.

It is an arithmetic number, because the mean of its divisors is an integer number (4005400533).

Almost surely, 2^15939016361 is an apocalyptic number.

It is an amenable number.

15939016361 is a deficient number, since it is larger than the sum of its proper divisors (82585771).

15939016361 is an equidigital number, since it uses as much as digits as its factorization.

15939016361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82585770.

The product of its (nonzero) digits is 131220, while the sum is 44.

The spelling of 15939016361 in words is "fifteen billion, nine hundred thirty-nine million, sixteen thousand, three hundred sixty-one".