1661564132302 has 8 divisors (see below), whose sum is σ = 2638954798416. Its totient is φ = 781912532832.

The previous prime is 1661564132299. The next prime is 1661564132311. The reversal of 1661564132302 is 2032314651661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24434766618 + ... + 24434766685.

It is an arithmetic number, because the mean of its divisors is an integer number (329869349802).

Almost surely, 2^{1661564132302} is an apocalyptic number.

1661564132302 is a deficient number, since it is larger than the sum of its proper divisors (977390666114).

1661564132302 is a wasteful number, since it uses less digits than its factorization.

1661564132302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48869533322.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 1661564132302 its reverse (2032314651661), we get a palindrome (3693878783963).

The spelling of 1661564132302 in words is "one trillion, six hundred sixty-one billion, five hundred sixty-four million, one hundred thirty-two thousand, three hundred two".