201663431145 has 48 divisors (see below), whose sum is σ = 381871848384. Its totient is φ = 97636560000.

The previous prime is 201663431117. The next prime is 201663431159. The reversal of 201663431145 is 541134366102.

201663431145 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 634 + 3 + 1 + 14 + 5 = 666.

It is not a de Polignac number, because 201663431145 - 2¹⁶ = 201663365609 is a prime.

It is a super-2 number, since 2×201663431145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56410 + ... + 637580.

It is an arithmetic number, because the mean of its divisors is an integer number (7955663508).

Almost surely, 2^201663431145 is an apocalyptic number.

It is an amenable number.

201663431145 is a deficient number, since it is larger than the sum of its proper divisors (180208417239).

201663431145 is a wasteful number, since it uses less digits than its factorization.

201663431145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581894 (or 581891 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 201663431145 its reverse (541134366102), we get a palindrome (742797797247).

The spelling of 201663431145 in words is "two hundred one billion, six hundred sixty-three million, four hundred thirty-one thousand, one hundred forty-five".