4401360081661 has 4 divisors (see below), whose sum is σ = 4430508161824. Its totient is φ = 4372212001500.

The previous prime is 4401360081659. The next prime is 4401360081667. The reversal of 4401360081661 is 1661800631044.

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 4401360081661 - 2¹ = 4401360081659 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 (4401360081667) 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, 14574039855 + ... + 14574040156.

It is an arithmetic number, because the mean of its divisors is an integer number (1107627040456).

Almost surely, 2^{4401360081661} is an apocalyptic number.

It is an amenable number.

4401360081661 is a deficient number, since it is larger than the sum of its proper divisors (29148080163).

4401360081661 is a wasteful number, since it uses less digits than its factorization.

4401360081661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29148080162.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 4401360081661 in words is "four trillion, four hundred one billion, three hundred sixty million, eighty-one thousand, six hundred sixty-one".