32090781321 has 27 divisors (see below), whose sum is σ = 46739230317. Its totient is φ = 21217223160.

The previous prime is 32090781319. The next prime is 32090781379. The reversal of 32090781321 is 12318709023.

The square root of 32090781321 is 179139.

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

32090781321 is a `hidden beast` number, since 320 + 9 + 0 + 7 + 8 + 1 + 321 = 666.

It is not a de Polignac number, because 32090781321 - 2¹ = 32090781319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (32090781301) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 113394846 + ... + 113395128.

Almost surely, 2^32090781321 is an apocalyptic number.

32090781321 is the 179139-th square number.

32090781321 is the 89570-th centered octagonal number.

It is an amenable number.

32090781321 is a deficient number, since it is larger than the sum of its proper divisors (14648448996).

32090781321 is an frugal number, since it uses more digits than its factorization.

32090781321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

Multiplying 32090781321 by its sum of digits (36), we get a square (1155268127556 = 1074834²).

The spelling of 32090781321 in words is "thirty-two billion, ninety million, seven hundred eighty-one thousand, three hundred twenty-one".