15828297381 has 12 divisors (see below), whose sum is σ = 24621796108. Its totient is φ = 9740490624.

The previous prime is 15828297379. The next prime is 15828297427. The reversal of 15828297381 is 18379282851.

15828297381 is a `hidden beast` number, since 1 + 582 + 8 + 29 + 7 + 38 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5939784900 + 9888512481 = 77070^2 + 99441^2 .

It is not a de Polignac number, because 15828297381 - 2¹ = 15828297379 is a prime.

It is a super-2 number, since 2×15828297381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15828297361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67642180 + ... + 67642413.

Almost surely, 2^15828297381 is an apocalyptic number.

It is an amenable number.

15828297381 is a deficient number, since it is larger than the sum of its proper divisors (8793498727).

15828297381 is a wasteful number, since it uses less digits than its factorization.

15828297381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135284612 (or 135284609 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 15828297381 in words is "fifteen billion, eight hundred twenty-eight million, two hundred ninety-seven thousand, three hundred eighty-one".