1653996388661 has 8 divisors (see below), whose sum is σ = 1667148648000. Its totient is φ = 1640852104320.

The previous prime is 1653996388609. The next prime is 1653996388813. The reversal of 1653996388661 is 1668836993561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1653996388661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1653996318661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1576961 + ... + 2407238.

It is an arithmetic number, because the mean of its divisors is an integer number (208393581000).

Almost surely, 2^{1653996388661} is an apocalyptic number.

It is an amenable number.

1653996388661 is a deficient number, since it is larger than the sum of its proper divisors (13152259339).

1653996388661 is a wasteful number, since it uses less digits than its factorization.

1653996388661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3987499.

The product of its digits is 302330880, while the sum is 71.

The spelling of 1653996388661 in words is "one trillion, six hundred fifty-three billion, nine hundred ninety-six million, three hundred eighty-eight thousand, six hundred sixty-one".