261426360503045 has 16 divisors (see below), whose sum is σ = 313965604915200. Its totient is φ = 208971818129664.

The previous prime is 261426360503027. The next prime is 261426360503089. The reversal of 261426360503045 is 540305063624162.

It is a cyclic number.

It is not a de Polignac number, because 261426360503045 - 2⁶ = 261426360502981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44171156 + ... + 49738754.

It is an arithmetic number, because the mean of its divisors is an integer number (19622850307200).

Almost surely, 2^{261426360503045} is an apocalyptic number.

It is an amenable number.

261426360503045 is a deficient number, since it is larger than the sum of its proper divisors (52539244412155).

261426360503045 is a wasteful number, since it uses less digits than its factorization.

261426360503045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575204.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 261426360503045 in words is "two hundred sixty-one trillion, four hundred twenty-six billion, three hundred sixty million, five hundred three thousand, forty-five".