15821461492 has 12 divisors (see below), whose sum is σ = 27749225700. Its totient is φ = 7893111296.

The previous prime is 15821461483. The next prime is 15821461493. The reversal of 15821461492 is 29416412851.

It can be written as a sum of positive squares in 2 ways, for example, as 3984891876 + 11836569616 = 63126^2 + 108796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15821461493) 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 3 ways as a sum of consecutive naturals, for example, 4402843 + ... + 4406434.

It is an arithmetic number, because the mean of its divisors is an integer number (2312435475).

Almost surely, 2^15821461492 is an apocalyptic number.

It is an amenable number.

15821461492 is a deficient number, since it is larger than the sum of its proper divisors (11927764208).

15821461492 is a wasteful number, since it uses less digits than its factorization.

15821461492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8809730 (or 8809728 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The spelling of 15821461492 in words is "fifteen billion, eight hundred twenty-one million, four hundred sixty-one thousand, four hundred ninety-two".