22441501661 has 4 divisors (see below), whose sum is σ = 23761590012. Its totient is φ = 21121413312.

The previous prime is 22441501651. The next prime is 22441501717. The reversal of 22441501661 is 16610514422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16610514422 = 2 ⋅8305257211.

It can be written as a sum of positive squares in 2 ways, for example, as 21110346436 + 1331155225 = 145294^2 + 36485^2 .

It is a cyclic number.

It is not a de Polignac number, because 22441501661 - 2¹⁴ = 22441485277 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 (22441501631) 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, 660044150 + ... + 660044183.

It is an arithmetic number, because the mean of its divisors is an integer number (5940397503).

Almost surely, 2^22441501661 is an apocalyptic number.

It is an amenable number.

22441501661 is a deficient number, since it is larger than the sum of its proper divisors (1320088351).

22441501661 is a wasteful number, since it uses less digits than its factorization.

22441501661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320088350.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 22441501661 in words is "twenty-two billion, four hundred forty-one million, five hundred one thousand, six hundred sixty-one".