200561621736 has 64 divisors (see below), whose sum is σ = 577545338880. Its totient is φ = 56852107200.

The previous prime is 200561621717. The next prime is 200561621737. The reversal of 200561621736 is 637126165002.

It is a super-2 number, since 2×200561621736² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200561621694 and 200561621703.

It is not an unprimeable number, because it can be changed into a prime (200561621737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4678740 + ... + 4721411.

It is an arithmetic number, because the mean of its divisors is an integer number (9024145920).

Almost surely, 2^200561621736 is an apocalyptic number.

It is an amenable number.

200561621736 is an abundant number, since it is smaller than the sum of its proper divisors (376983717144).

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

200561621736 is a wasteful number, since it uses less digits than its factorization.

200561621736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9400294 (or 9400290 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

Adding to 200561621736 its reverse (637126165002), we get a palindrome (837687786738).

The spelling of 200561621736 in words is "two hundred billion, five hundred sixty-one million, six hundred twenty-one thousand, seven hundred thirty-six".