12161003634 has 64 divisors (see below), whose sum is σ = 29780150400. Its totient is φ = 3654818496.

The previous prime is 12161003597. The next prime is 12161003641. The reversal of 12161003634 is 43630016121.

12161003634 is a `hidden beast` number, since 1 + 2 + 16 + 10 + 0 + 3 + 634 = 666.

It is a super-2 number, since 2×12161003634² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12161003598 and 12161003607.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171249 + ... + 231620.

It is an arithmetic number, because the mean of its divisors is an integer number (465314850).

Almost surely, 2^12161003634 is an apocalyptic number.

12161003634 is an abundant number, since it is smaller than the sum of its proper divisors (17619146766).

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

12161003634 is a wasteful number, since it uses less digits than its factorization.

12161003634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402936 (or 402930 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 12161003634 its reverse (43630016121), we get a palindrome (55791019755).

The spelling of 12161003634 in words is "twelve billion, one hundred sixty-one million, three thousand, six hundred thirty-four".