4422981641 has 18 divisors (see below), whose sum is σ = 4909361130. Its totient is φ = 3982917120.

The previous prime is 4422981601. The next prime is 4422981679. The reversal of 4422981641 is 1461892244.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 4311235600 + 111746041 = 65660^2 + 10571^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4422981641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4422981601) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 276305 + ... + 291873.

It is an arithmetic number, because the mean of its divisors is an integer number (272742285).

Almost surely, 2^4422981641 is an apocalyptic number.

4422981641 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4422981641 is a deficient number, since it is larger than the sum of its proper divisors (486379489).

4422981641 is a wasteful number, since it uses less digits than its factorization.

4422981641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15677 (or 15623 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 4422981641 is about 66505.5008326379. The cubic root of 4422981641 is about 1641.4905199252.

The spelling of 4422981641 in words is "four billion, four hundred twenty-two million, nine hundred eighty-one thousand, six hundred forty-one".