2172016651648 has 32 divisors (see below), whose sum is σ = 4366762290000. Its totient is φ = 1076044939776.

The previous prime is 2172016651633. The next prime is 2172016651657. The reversal of 2172016651648 is 8461566102712.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×2172016651648² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77824948 + ... + 77852851.

Almost surely, 2^{2172016651648} is an apocalyptic number.

It is an amenable number.

2172016651648 is an abundant number, since it is smaller than the sum of its proper divisors (2194745638352).

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

2172016651648 is a wasteful number, since it uses less digits than its factorization.

2172016651648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155677922 (or 155677910 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 2172016651648 in words is "two trillion, one hundred seventy-two billion, sixteen million, six hundred fifty-one thousand, six hundred forty-eight".