201266154553 has 4 divisors (see below), whose sum is σ = 202548104740. Its totient is φ = 199984204368.

The previous prime is 201266154547. The next prime is 201266154601. The reversal of 201266154553 is 355451662102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36696382969 + 164569771584 = 191563^2 + 405672^2 .

It is a cyclic number.

It is not a de Polignac number, because 201266154553 - 2³³ = 192676219961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201266154053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640974858 + ... + 640975171.

It is an arithmetic number, because the mean of its divisors is an integer number (50637026185).

Almost surely, 2^201266154553 is an apocalyptic number.

It is an amenable number.

201266154553 is a deficient number, since it is larger than the sum of its proper divisors (1281950187).

201266154553 is a wasteful number, since it uses less digits than its factorization.

201266154553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281950186.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 201266154553 in words is "two hundred one billion, two hundred sixty-six million, one hundred fifty-four thousand, five hundred fifty-three".