15642131332 has 6 divisors (see below), whose sum is σ = 27373729838. Its totient is φ = 7821065664.

The previous prime is 15642131321. The next prime is 15642131353. The reversal of 15642131332 is 23313124651.

It can be written as a sum of positive squares in only one way, i.e., 8240282176 + 7401849156 = 90776^2 + 86034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15642131294 and 15642131303.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1955266413 + ... + 1955266420.

Almost surely, 2^15642131332 is an apocalyptic number.

It is an amenable number.

15642131332 is a deficient number, since it is larger than the sum of its proper divisors (11731598506).

15642131332 is a wasteful number, since it uses less digits than its factorization.

15642131332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910532837 (or 3910532835 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

Adding to 15642131332 its reverse (23313124651), we get a palindrome (38955255983).

The spelling of 15642131332 in words is "fifteen billion, six hundred forty-two million, one hundred thirty-one thousand, three hundred thirty-two".