4691356996561 has 4 divisors (see below), whose sum is σ = 4691365745472. Its totient is φ = 4691348247652.

The previous prime is 4691356996549. The next prime is 4691356996589. The reversal of 4691356996561 is 1656996531964.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4691356996561 - 2¹⁵ = 4691356963793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4691356996511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3513661 + ... + 4661386.

It is an arithmetic number, because the mean of its divisors is an integer number (1172841436368).

Almost surely, 2^{4691356996561} is an apocalyptic number.

It is an amenable number.

4691356996561 is a deficient number, since it is larger than the sum of its proper divisors (8748911).

4691356996561 is an equidigital number, since it uses as much as digits as its factorization.

4691356996561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748910.

The product of its digits is 283435200, while the sum is 70.

The spelling of 4691356996561 in words is "four trillion, six hundred ninety-one billion, three hundred fifty-six million, nine hundred ninety-six thousand, five hundred sixty-one".