261236808632162 has 12 divisors (see below), whose sum is σ = 430716886960038. Its totient is φ = 118744003923600.

The previous prime is 261236808632161. The next prime is 261236808632201.

261236808632162 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 148866865612201 + 112369943019961 = 12201101^2 + 10600469^2 .

It is a junction number, because it is equal to n+sod(n) for n = 261236808632098 and 261236808632107.

It is not an unprimeable number, because it can be changed into a prime (261236808632161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 539745472139 + ... + 539745472622.

Almost surely, 2^{261236808632162} is an apocalyptic number.

261236808632162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261236808632162 is a deficient number, since it is larger than the sum of its proper divisors (169480078327876).

261236808632162 is a wasteful number, since it uses less digits than its factorization.

261236808632162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079490944785 (or 1079490944774 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 261236808632162 in words is "two hundred sixty-one trillion, two hundred thirty-six billion, eight hundred eight million, six hundred thirty-two thousand, one hundred sixty-two".