261114401855 has 8 divisors (see below), whose sum is σ = 313447745952. Its totient is φ = 208817879008.

The previous prime is 261114401813. The next prime is 261114401887. The reversal of 261114401855 is 558104411162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261114401855 - 2¹⁸ = 261114139711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9189707 + ... + 9218076.

It is an arithmetic number, because the mean of its divisors is an integer number (39180968244).

Almost surely, 2^261114401855 is an apocalyptic number.

261114401855 is a deficient number, since it is larger than the sum of its proper divisors (52333344097).

261114401855 is a wasteful number, since it uses less digits than its factorization.

261114401855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18410625.

The product of its (nonzero) digits is 38400, while the sum is 38.

The spelling of 261114401855 in words is "two hundred sixty-one billion, one hundred fourteen million, four hundred one thousand, eight hundred fifty-five".