261036078 has 16 divisors (see below), whose sum is σ = 522398160. Its totient is φ = 86957696.

The previous prime is 261036043. The next prime is 261036091. The reversal of 261036078 is 870630162.

It is a Curzon 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, 2475 + ... + 22982.

It is an arithmetic number, because the mean of its divisors is an integer number (32649885).

Almost surely, 2^261036078 is an apocalyptic number.

261036078 is an abundant number, since it is smaller than the sum of its proper divisors (261362082).

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

261036078 is a wasteful number, since it uses less digits than its factorization.

261036078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27171.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 261036078 is about 16156.6109688882. The cubic root of 261036078 is about 639.0970975660.

The spelling of 261036078 in words is "two hundred sixty-one million, thirty-six thousand, seventy-eight".