10001656511661 has 8 divisors (see below), whose sum is σ = 13335722962720. Its totient is φ = 6667680534192.

The previous prime is 10001656511659. The next prime is 10001656511669. The reversal of 10001656511661 is 16611565610001.

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

It is not a de Polignac number, because 10001656511661 - 2¹ = 10001656511659 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 (10001656511669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22360030 + ... + 22802943.

It is an arithmetic number, because the mean of its divisors is an integer number (1666965370340).

Almost surely, 2^{10001656511661} is an apocalyptic number.

It is an amenable number.

10001656511661 is a deficient number, since it is larger than the sum of its proper divisors (3334066451059).

10001656511661 is an equidigital number, since it uses as much as digits as its factorization.

10001656511661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45236795.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 10001656511661 in words is "ten trillion, one billion, six hundred fifty-six million, five hundred eleven thousand, six hundred sixty-one".