1644602570016 has 96 divisors (see below), whose sum is σ = 5224031729280. Its totient is φ = 442246066176.

The previous prime is 1644602570003. The next prime is 1644602570047. The reversal of 1644602570016 is 6100752064461.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1644602570016² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1644602570016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71968731 + ... + 71991578.

It is an arithmetic number, because the mean of its divisors is an integer number (54416997180).

Almost surely, 2^{1644602570016} is an apocalyptic number.

1644602570016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1644602570016 is an abundant number, since it is smaller than the sum of its proper divisors (3579429159264).

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

1644602570016 is a wasteful number, since it uses less digits than its factorization.

1644602570016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143960346 (or 143960338 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 1644602570016 in words is "one trillion, six hundred forty-four billion, six hundred two million, five hundred seventy thousand, sixteen".