261829291683632 has 10 divisors (see below), whose sum is σ = 507294252637068. Its totient is φ = 130914645841808.

The previous prime is 261829291683607. The next prime is 261829291683649. The reversal of 261829291683632 is 236386192928162.

261829291683632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261829291683632² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8182165365098 + ... + 8182165365129.

Almost surely, 2^{261829291683632} is an apocalyptic number.

It is an amenable number.

261829291683632 is a deficient number, since it is larger than the sum of its proper divisors (245464960953436).

261829291683632 is a wasteful number, since it uses less digits than its factorization.

261829291683632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16364330730235 (or 16364330730229 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 68.

The spelling of 261829291683632 in words is "two hundred sixty-one trillion, eight hundred twenty-nine billion, two hundred ninety-one million, six hundred eighty-three thousand, six hundred thirty-two".