15957818349 has 16 divisors (see below), whose sum is σ = 24576747840. Its totient is φ = 9102498560.

The previous prime is 15957818339. The next prime is 15957818413. The reversal of 15957818349 is 94381875951.

It is a cyclic number.

It is not a de Polignac number, because 15957818349 - 2¹⁹ = 15957294061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15957818292 and 15957818301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15957818329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14222094 + ... + 14223215.

It is an arithmetic number, because the mean of its divisors is an integer number (1536046740).

Almost surely, 2^15957818349 is an apocalyptic number.

It is an amenable number.

15957818349 is a deficient number, since it is larger than the sum of its proper divisors (8618929491).

15957818349 is a wasteful number, since it uses less digits than its factorization.

15957818349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28445340.

The product of its digits is 10886400, while the sum is 60.

The spelling of 15957818349 in words is "fifteen billion, nine hundred fifty-seven million, eight hundred eighteen thousand, three hundred forty-nine".