1644311356053 has 8 divisors (see below), whose sum is σ = 2192421734400. Its totient is φ = 1096204274208.

The previous prime is 1644311356013. The next prime is 1644311356063. The reversal of 1644311356053 is 3506531134461.

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

It is not a de Polignac number, because 1644311356053 - 2²⁴ = 1644294578837 is a prime.

It is a super-3 number, since 3×1644311356053³ (a number of 38 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1644311355996 and 1644311356014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644311356013) 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, 793153 + ... + 1979321.

It is an arithmetic number, because the mean of its divisors is an integer number (274052716800).

Almost surely, 2^{1644311356053} is an apocalyptic number.

It is an amenable number.

1644311356053 is a deficient number, since it is larger than the sum of its proper divisors (548110378347).

1644311356053 is a wasteful number, since it uses less digits than its factorization.

1644311356053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648251.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 1644311356053 in words is "one trillion, six hundred forty-four billion, three hundred eleven million, three hundred fifty-six thousand, fifty-three".