201620334636 has 72 divisors (see below), whose sum is σ = 583572813824. Its totient is φ = 57495627360.

The previous prime is 201620334623. The next prime is 201620334649. The reversal of 201620334636 is 636433026102.

201620334636 is a `hidden beast` number, since 2 + 0 + 16 + 2 + 0 + 3 + 3 + 4 + 636 = 666.

It is an interprime number because it is at equal distance from previous prime (201620334623) and next prime (201620334649).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 201620334636.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 633100 + ... + 896691.

Almost surely, 2^201620334636 is an apocalyptic number.

It is an amenable number.

201620334636 is an abundant number, since it is smaller than the sum of its proper divisors (381952479188).

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

201620334636 is a wasteful number, since it uses less digits than its factorization.

201620334636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530331 (or 1530326 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The spelling of 201620334636 in words is "two hundred one billion, six hundred twenty million, three hundred thirty-four thousand, six hundred thirty-six".