15961853441 has 4 divisors (see below), whose sum is σ = 16301467392. Its totient is φ = 15622239492.

The previous prime is 15961853429. The next prime is 15961853449. The reversal of 15961853441 is 14435816951.

15961853441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14435816951 = 17 ⋅849165703.

It is a cyclic number.

It is not a de Polignac number, because 15961853441 - 2¹⁴ = 15961837057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 339613903 = 15961853441 / (1 + 5 + 9 + 6 + 1 + 8 + 5 + 3 + 4 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15961853449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169806905 + ... + 169806998.

It is an arithmetic number, because the mean of its divisors is an integer number (4075366848).

Almost surely, 2^15961853441 is an apocalyptic number.

It is an amenable number.

15961853441 is a deficient number, since it is larger than the sum of its proper divisors (339613951).

15961853441 is an equidigital number, since it uses as much as digits as its factorization.

15961853441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339613950.

The product of its digits is 518400, while the sum is 47.

The spelling of 15961853441 in words is "fifteen billion, nine hundred sixty-one million, eight hundred fifty-three thousand, four hundred forty-one".