201554320754 has 4 divisors (see below), whose sum is σ = 302331481134. Its totient is φ = 100777160376.

The previous prime is 201554320729. The next prime is 201554320769. The reversal of 201554320754 is 457023455102.

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

It can be written as a sum of positive squares in only one way, i.e., 150755922529 + 50798398225 = 388273^2 + 225385^2 .

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 as a sum of consecutive naturals, namely, 50388580187 + ... + 50388580190.

Almost surely, 2^201554320754 is an apocalyptic number.

201554320754 is a deficient number, since it is larger than the sum of its proper divisors (100777160380).

201554320754 is a wasteful number, since it uses less digits than its factorization.

201554320754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100777160379.

The product of its (nonzero) digits is 168000, while the sum is 38.

Adding to 201554320754 its reverse (457023455102), we get a palindrome (658577775856).

The spelling of 201554320754 in words is "two hundred one billion, five hundred fifty-four million, three hundred twenty thousand, seven hundred fifty-four".