1644046355226 has 16 divisors (see below), whose sum is σ = 3587010229728. Its totient is φ = 498195865200.

The previous prime is 1644046355221. The next prime is 1644046355339. The reversal of 1644046355226 is 6225536404461.

It is a super-3 number, since 3×1644046355226³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1644046355221) 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, 12454896565 + ... + 12454896696.

It is an arithmetic number, because the mean of its divisors is an integer number (224188139358).

Almost surely, 2^{1644046355226} is an apocalyptic number.

1644046355226 is an abundant number, since it is smaller than the sum of its proper divisors (1942963874502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1644046355226 is a wasteful number, since it uses less digits than its factorization.

1644046355226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24909793277.

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 1644046355226 in words is "one trillion, six hundred forty-four billion, forty-six million, three hundred fifty-five thousand, two hundred twenty-six".