42226021536661 has 8 divisors (see below), whose sum is σ = 42404027761304. Its totient is φ = 42048038407680.

The previous prime is 42226021536623. The next prime is 42226021536701. The reversal of 42226021536661 is 16663512062224.

It can be written as a sum of positive squares in 4 ways, for example, as 15510758256900 + 26715263279761 = 3938370^2 + 5168681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42226021536661 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 (42226021536161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2104686 + ... + 9427711.

It is an arithmetic number, because the mean of its divisors is an integer number (5300503470163).

Almost surely, 2^{42226021536661} is an apocalyptic number.

It is an amenable number.

42226021536661 is a deficient number, since it is larger than the sum of its proper divisors (178006224643).

42226021536661 is a wasteful number, since it uses less digits than its factorization.

42226021536661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11547831.

The product of its (nonzero) digits is 1244160, while the sum is 46.

Adding to 42226021536661 its reverse (16663512062224), we get a palindrome (58889533598885).

The spelling of 42226021536661 in words is "forty-two trillion, two hundred twenty-six billion, twenty-one million, five hundred thirty-six thousand, six hundred sixty-one".