10161236652661 has 4 divisors (see below), whose sum is σ = 10161243183424. Its totient is φ = 10161230121900.

The previous prime is 10161236652659. The next prime is 10161236652701. The reversal of 10161236652661 is 16625663216101.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10161236652661 - 2¹ = 10161236652659 is a prime.

It is a super-2 number, since 2×10161236652661² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10161236652761) 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, 570466 + ... + 4543996.

It is an arithmetic number, because the mean of its divisors is an integer number (2540310795856).

Almost surely, 2^{10161236652661} is an apocalyptic number.

It is an amenable number.

10161236652661 is a deficient number, since it is larger than the sum of its proper divisors (6530763).

10161236652661 is an equidigital number, since it uses as much as digits as its factorization.

10161236652661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530762.

The product of its (nonzero) digits is 466560, while the sum is 46.

Adding to 10161236652661 its reverse (16625663216101), we get a palindrome (26786899868762).

The spelling of 10161236652661 in words is "ten trillion, one hundred sixty-one billion, two hundred thirty-six million, six hundred fifty-two thousand, six hundred sixty-one".