261041015578 has 8 divisors (see below), whose sum is σ = 447498883872. Its totient is φ = 111874720956.

The previous prime is 261041015563. The next prime is 261041015597. The reversal of 261041015578 is 875510140162.

261041015578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 261041015578.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9322893400 + ... + 9322893427.

It is an arithmetic number, because the mean of its divisors is an integer number (55937360484).

Almost surely, 2^261041015578 is an apocalyptic number.

261041015578 is a deficient number, since it is larger than the sum of its proper divisors (186457868294).

261041015578 is a wasteful number, since it uses less digits than its factorization.

261041015578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18645786836.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 261041015578 in words is "two hundred sixty-one billion, forty-one million, fifteen thousand, five hundred seventy-eight".