15941885421 has 32 divisors (see below), whose sum is σ = 26508358656. Its totient is φ = 8279136000.

The previous prime is 15941885413. The next prime is 15941885431. The reversal of 15941885421 is 12458814951.

It is not a de Polignac number, because 15941885421 - 2³ = 15941885413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15941885411) 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 31 ways as a sum of consecutive naturals, for example, 1046026 + ... + 1061156.

It is an arithmetic number, because the mean of its divisors is an integer number (828386208).

Almost surely, 2^15941885421 is an apocalyptic number.

15941885421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15941885421 is a deficient number, since it is larger than the sum of its proper divisors (10566473235).

15941885421 is a wasteful number, since it uses less digits than its factorization.

15941885421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19713.

The product of its digits is 460800, while the sum is 48.

The spelling of 15941885421 in words is "fifteen billion, nine hundred forty-one million, eight hundred eighty-five thousand, four hundred twenty-one".