161635202010 has 48 divisors (see below), whose sum is σ = 427140909000. Its totient is φ = 42396117120.

The previous prime is 161635201999. The next prime is 161635202021. The reversal of 161635202010 is 10202536161.

161635202010 is a `hidden beast` number, since 1 + 6 + 1 + 635 + 2 + 0 + 20 + 1 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (161635201999) and next prime (161635202021).

It can be written as a sum of positive squares in 4 ways, for example, as 133865979129 + 27769222881 = 365877^2 + 166641^2 .

It is a super-2 number, since 2×161635202010² (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 23 ways as a sum of consecutive naturals, for example, 14715385 + ... + 14726364.

Almost surely, 2^161635202010 is an apocalyptic number.

161635202010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161635202010 is an abundant number, since it is smaller than the sum of its proper divisors (265505706990).

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

161635202010 is a wasteful number, since it uses less digits than its factorization.

161635202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29441823 (or 29441820 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 161635202010 its reverse (10202536161), we get a palindrome (171837738171).

The spelling of 161635202010 in words is "one hundred sixty-one billion, six hundred thirty-five million, two hundred two thousand, ten".