201451511545 has 8 divisors (see below), whose sum is σ = 243959629320. Its totient is φ = 159682665600.

The previous prime is 201451511479. The next prime is 201451511557. The reversal of 201451511545 is 545115154102.

It can be written as a sum of positive squares in 4 ways, for example, as 59915290176 + 141536221369 = 244776^2 + 376213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-201451511545 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201451511545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184817356 + ... + 184818445.

It is an arithmetic number, because the mean of its divisors is an integer number (30494953665).

Almost surely, 2^201451511545 is an apocalyptic number.

It is an amenable number.

201451511545 is a deficient number, since it is larger than the sum of its proper divisors (42508117775).

201451511545 is a wasteful number, since it uses less digits than its factorization.

201451511545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369635915.

The product of its (nonzero) digits is 20000, while the sum is 34.

Adding to 201451511545 its reverse (545115154102), we get a palindrome (746566665647).

The spelling of 201451511545 in words is "two hundred one billion, four hundred fifty-one million, five hundred eleven thousand, five hundred forty-five".