15943912349 has 16 divisors (see below), whose sum is σ = 17470721520. Its totient is φ = 14482944000.

The previous prime is 15943912333. The next prime is 15943912357. The reversal of 15943912349 is 94321934951.

It can be written as a sum of positive squares in 8 ways, for example, as 186131449 + 15757780900 = 13643^2 + 125530^2 .

It is a cyclic number.

It is not a de Polignac number, because 15943912349 - 2⁴ = 15943912333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15943912297 and 15943912306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15943912549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1766849 + ... + 1775849.

It is an arithmetic number, because the mean of its divisors is an integer number (1091920095).

Almost surely, 2^15943912349 is an apocalyptic number.

It is an amenable number.

15943912349 is a deficient number, since it is larger than the sum of its proper divisors (1526809171).

15943912349 is a wasteful number, since it uses less digits than its factorization.

15943912349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12640.

The product of its digits is 1049760, while the sum is 50.

The spelling of 15943912349 in words is "fifteen billion, nine hundred forty-three million, nine hundred twelve thousand, three hundred forty-nine".