201787247245 has 8 divisors (see below), whose sum is σ = 248689148184. Its totient is φ = 157066830144.

The previous prime is 201787247243. The next prime is 201787247269. The reversal of 201787247245 is 542742787102.

It can be written as a sum of positive squares in 4 ways, for example, as 120472162281 + 81315084964 = 347091^2 + 285158^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201787247245 - 2¹ = 201787247243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201787247243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545370754 + ... + 545371123.

It is an arithmetic number, because the mean of its divisors is an integer number (31086143523).

Almost surely, 2^201787247245 is an apocalyptic number.

It is an amenable number.

201787247245 is a deficient number, since it is larger than the sum of its proper divisors (46901900939).

201787247245 is a wasteful number, since it uses less digits than its factorization.

201787247245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090741919.

The product of its (nonzero) digits is 1756160, while the sum is 49.

The spelling of 201787247245 in words is "two hundred one billion, seven hundred eighty-seven million, two hundred forty-seven thousand, two hundred forty-five".