15974442381 has 8 divisors (see below), whose sum is σ = 21518836864. Its totient is φ = 10539838080.

The previous prime is 15974442361. The next prime is 15974442403. The reversal of 15974442381 is 18324447951.

15974442381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15974442381 - 2⁶ = 15974442317 is a prime.

It is a super-2 number, since 2×15974442381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15974442381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15974442301) 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 7 ways as a sum of consecutive naturals, for example, 27447205 + ... + 27447786.

It is an arithmetic number, because the mean of its divisors is an integer number (2689854608).

Almost surely, 2^15974442381 is an apocalyptic number.

It is an amenable number.

15974442381 is a deficient number, since it is larger than the sum of its proper divisors (5544394483).

15974442381 is an equidigital number, since it uses as much as digits as its factorization.

15974442381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54895091.

The product of its digits is 967680, while the sum is 48.

The spelling of 15974442381 in words is "fifteen billion, nine hundred seventy-four million, four hundred forty-two thousand, three hundred eighty-one".