17661464004097 has 4 divisors (see below), whose sum is σ = 17717890406980. Its totient is φ = 17605037601216.

The previous prime is 17661464004073. The next prime is 17661464004101. The reversal of 17661464004097 is 79040046416671.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3424735164816 + 14236728839281 = 1850604^2 + 3773159^2 .

It is a cyclic number.

It is not a de Polignac number, because 17661464004097 - 2¹⁹ = 17661463479809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17661464004017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28213200972 + ... + 28213201597.

It is an arithmetic number, because the mean of its divisors is an integer number (4429472601745).

Almost surely, 2^{17661464004097} is an apocalyptic number.

It is an amenable number.

17661464004097 is a deficient number, since it is larger than the sum of its proper divisors (56426402883).

17661464004097 is an equidigital number, since it uses as much as digits as its factorization.

17661464004097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56426402882.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 17661464004097 in words is "seventeen trillion, six hundred sixty-one billion, four hundred sixty-four million, four thousand, ninety-seven".