1644262452146 has 16 divisors (see below), whose sum is σ = 2478615033600. Its totient is φ = 818062723968.

The previous prime is 1644262452137. The next prime is 1644262452167. The reversal of 1644262452146 is 6412542624461.

It is a super-3 number, since 3×1644262452146³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1644262452146.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697151 + ... + 1942818.

It is an arithmetic number, because the mean of its divisors is an integer number (154913439600).

Almost surely, 2^{1644262452146} is an apocalyptic number.

1644262452146 is a deficient number, since it is larger than the sum of its proper divisors (834352581454).

1644262452146 is a wasteful number, since it uses less digits than its factorization.

1644262452146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641513.

The product of its digits is 2211840, while the sum is 47.

The spelling of 1644262452146 in words is "one trillion, six hundred forty-four billion, two hundred sixty-two million, four hundred fifty-two thousand, one hundred forty-six".