32378043721 has 3 divisors (see below), whose sum is σ = 32378223661. Its totient is φ = 32377863782.

The previous prime is 32378043679. The next prime is 32378043749. The reversal of 32378043721 is 12734087323.

The square root of 32378043721 is 179939.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12734087323 = 1489 ⋅8552107.

It is a de Polignac number, because none of the positive numbers 2^k-32378043721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32378043751) 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 2 ways as a sum of consecutive naturals, for example, 89970 + ... + 269908.

Almost surely, 2^32378043721 is an apocalyptic number.

32378043721 is the 179939-th square number.

32378043721 is the 89970-th centered octagonal number.

It is an amenable number.

32378043721 is a deficient number, since it is larger than the sum of its proper divisors (179940).

32378043721 is an frugal number, since it uses more digits than its factorization.

32378043721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359878 (or 179939 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 32378043721 in words is "thirty-two billion, three hundred seventy-eight million, forty-three thousand, seven hundred twenty-one".