32490681997221 has 24 divisors (see below), whose sum is σ = 53859827523840. Its totient is φ = 18488421546336.

The previous prime is 32490681997217. The next prime is 32490681997231. The reversal of 32490681997221 is 12279918609423.

32490681997221 is a `hidden beast` number, since 3 + 2 + 490 + 68 + 19 + 9 + 72 + 2 + 1 = 666.

It is not a de Polignac number, because 32490681997221 - 2² = 32490681997217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32490681997231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1078907770 + ... + 1078937883.

It is an arithmetic number, because the mean of its divisors is an integer number (2244159480160).

Almost surely, 2^{32490681997221} is an apocalyptic number.

It is an amenable number.

32490681997221 is a deficient number, since it is larger than the sum of its proper divisors (21369145526619).

32490681997221 is a wasteful number, since it uses less digits than its factorization.

32490681997221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157845905 (or 2157845902 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 32490681997221 in words is "thirty-two trillion, four hundred ninety billion, six hundred eighty-one million, nine hundred ninety-seven thousand, two hundred twenty-one".