201855249396 has 60 divisors (see below), whose sum is σ = 527755586820. Its totient is φ = 67276656000.

The previous prime is 201855249391. The next prime is 201855249403. The reversal of 201855249396 is 693942558102.

201855249396 is a `hidden beast` number, since 2 + 0 + 1 + 8 + 5 + 5 + 249 + 396 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 107003568996 + 94851680400 = 327114^2 + 307980^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201855249391) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2890896 + ... + 2959896.

It is an arithmetic number, because the mean of its divisors is an integer number (8795926447).

Almost surely, 2^201855249396 is an apocalyptic number.

It is an amenable number.

201855249396 is an abundant number, since it is smaller than the sum of its proper divisors (325900337424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201855249396 is a wasteful number, since it uses less digits than its factorization.

201855249396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78046 (or 78035 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 201855249396 in words is "two hundred one billion, eight hundred fifty-five million, two hundred forty-nine thousand, three hundred ninety-six".