201064256443551 has 16 divisors (see below), whose sum is σ = 268329284462304. Its totient is φ = 133921036255104.

The previous prime is 201064256443541. The next prime is 201064256443619. The reversal of 201064256443551 is 155344652460102.

It is not a de Polignac number, because 201064256443551 - 2⁶ = 201064256443487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201064256443551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201064256443541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277761481 + ... + 278484413.

It is an arithmetic number, because the mean of its divisors is an integer number (16770580278894).

Almost surely, 2^{201064256443551} is an apocalyptic number.

201064256443551 is a deficient number, since it is larger than the sum of its proper divisors (67265028018753).

201064256443551 is a wasteful number, since it uses less digits than its factorization.

201064256443551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807050.

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 201064256443551 in words is "two hundred one trillion, sixty-four billion, two hundred fifty-six million, four hundred forty-three thousand, five hundred fifty-one".