201654665503 has 2 divisors, whose sum is σ = 201654665504. Its totient is φ = 201654665502.

The previous prime is 201654665501. The next prime is 201654665539. The reversal of 201654665503 is 305566456102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201654665503 - 2¹ = 201654665501 is a prime.

Together with 201654665501, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 201654665503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201654665501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100827332751 + 100827332752.

It is an arithmetic number, because the mean of its divisors is an integer number (100827332752).

Almost surely, 2^201654665503 is an apocalyptic number.

201654665503 is a deficient number, since it is larger than the sum of its proper divisors (1).

201654665503 is an equidigital number, since it uses as much as digits as its factorization.

201654665503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 201654665503 in words is "two hundred one billion, six hundred fifty-four million, six hundred sixty-five thousand, five hundred three".