261524346216406 has 64 divisors (see below), whose sum is σ = 499517722166400. Its totient is φ = 99881632521216.

The previous prime is 261524346216379. The next prime is 261524346216467. The reversal of 261524346216406 is 604612643425162.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 45491290 + ... + 50916658.

It is an arithmetic number, because the mean of its divisors is an integer number (7804964408850).

Almost surely, 2^{261524346216406} is an apocalyptic number.

261524346216406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

261524346216406 is a deficient number, since it is larger than the sum of its proper divisors (237993375949994).

261524346216406 is a wasteful number, since it uses less digits than its factorization.

261524346216406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5434553.

The product of its (nonzero) digits is 9953280, while the sum is 52.

The spelling of 261524346216406 in words is "two hundred sixty-one trillion, five hundred twenty-four billion, three hundred forty-six million, two hundred sixteen thousand, four hundred six".