15778132382 has 4 divisors (see below), whose sum is σ = 23667198576. Its totient is φ = 7889066190.

The previous prime is 15778132369. The next prime is 15778132397. The reversal of 15778132382 is 28323187751.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×15778132382² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 3944533094 + ... + 3944533097.

It is an arithmetic number, because the mean of its divisors is an integer number (5916799644).

Almost surely, 2^15778132382 is an apocalyptic number.

15778132382 is a deficient number, since it is larger than the sum of its proper divisors (7889066194).

15778132382 is an equidigital number, since it uses as much as digits as its factorization.

15778132382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7889066193.

The product of its digits is 564480, while the sum is 47.

The spelling of 15778132382 in words is "fifteen billion, seven hundred seventy-eight million, one hundred thirty-two thousand, three hundred eighty-two".