2172016651633 has 2 divisors, whose sum is σ = 2172016651634. Its totient is φ = 2172016651632.

The previous prime is 2172016651589. The next prime is 2172016651657. The reversal of 2172016651633 is 3361566102712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1700290818304 + 471725833329 = 1303952^2 + 686823^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172016651633 - 2¹⁷ = 2172016520561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2172016651633.

It is not a weakly prime, because it can be changed into another prime (2172016651333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086008325816 + 1086008325817.

It is an arithmetic number, because the mean of its divisors is an integer number (1086008325817).

Almost surely, 2^{2172016651633} is an apocalyptic number.

It is an amenable number.

2172016651633 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172016651633 is an equidigital number, since it uses as much as digits as its factorization.

2172016651633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 2172016651633 in words is "two trillion, one hundred seventy-two billion, sixteen million, six hundred fifty-one thousand, six hundred thirty-three".