261341140746100 has 36 divisors (see below), whose sum is σ = 567452527001164. Its totient is φ = 104473368449280.

The previous prime is 261341140746089. The next prime is 261341140746137. The reversal of 261341140746100 is 1647041143162.

It can be written as a sum of positive squares in 6 ways, for example, as 49603370077156 + 211737770668944 = 7042966^2 + 14551212^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 788431587 + ... + 788762986.

Almost surely, 2^{261341140746100} is an apocalyptic number.

261341140746100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261341140746100 is an abundant number, since it is smaller than the sum of its proper divisors (306111386255064).

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

261341140746100 is a wasteful number, since it uses less digits than its factorization.

261341140746100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577196244 (or 1577196237 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

Adding to 261341140746100 its reverse (1647041143162), we get a palindrome (262988181889262).

The spelling of 261341140746100 in words is "two hundred sixty-one trillion, three hundred forty-one billion, one hundred forty million, seven hundred forty-six thousand, one hundred".